diff --git a/Diophantus.c b/Diophantus.c
new file mode 100644
index 00000000..4f2275bc
--- /dev/null
+++ b/Diophantus.c
@@ -0,0 +1,18 @@
+#include <stdio.h>
+int main(int argc, char** argv)
+{
+    int fatherAge=0;
+	for(double i=1.0;i<100;i++)           //儿子年龄 
+	{
+		for(double j=1;j<200;j++)       //父亲年龄 
+		{
+			if((1.0/6.0*j+1.0/12.0*j+1.0/7.0*j+5+i+4==j)&&(2*i==j))
+			{
+				fatherAge=j;
+				break;
+			}
+		}
+	}
+	printf("儿子死时丢番图年龄为%d",FatherAge-4);
+	return 0;
+}
diff --git a/Encrypted.c b/Encrypted.c
new file mode 100644
index 00000000..50f35036
--- /dev/null
+++ b/Encrypted.c
@@ -0,0 +1,52 @@
+#include <stdio.h> 
+#include <string.h>
+#include <stdlib.h>
+
+void Encrypte(char* p)
+{
+	int i = 0;
+	while (p[i] != '\0')
+	{
+		p[i] = p[i] + '3' - '1';
+		printf("%c", p[i]);
+		i++;
+	}
+	printf("\n");
+}
+
+void Decrypte(char* p)
+{
+	int i = 0;
+	while (p[i] != '\0')
+	{
+		p[i] = p[i] - '3' + '1';
+		printf("%c", p[i]);
+		i++;
+	}
+	printf("\n");
+}
+
+int main()
+{
+	char p[10000];
+	int Judge = 0;
+	printf("Please input the string need opreating\n");
+	scanf("%s", p);
+	printf("En or De?\nPleaes input 1(En) or 2(De)\n");
+	scanf("%d", &Judge);
+	if (Judge == 1)
+	{
+		Encrypte(p);
+	}
+	else if (Judge == 2)
+	{
+		Decrypte(p);
+	}
+	else
+	{
+		printf("Input Error!");
+		return -1;
+	}
+    return 0;
+}
+
diff --git a/Goldbach.c b/Goldbach.c
new file mode 100644
index 00000000..86b8ad4e
--- /dev/null
+++ b/Goldbach.c
@@ -0,0 +1,85 @@
+#include <stdio.h>
+
+/*int pd(int n)
+{
+	for(int i=2;i<=n/2;i++)                    //This program is used for drawing a table
+	{
+		if(n%i==0)
+		return 0;
+	}
+	return 1;
+}
+
+
+int main(int argc, char** argv) 
+{
+	int a[100];
+	int tot=0;
+	printf("a[0]=2\n");
+	for(int i=3;i<100;i++)
+	{
+		if(pd(i))
+		{
+			a[tot++]=i;
+			printf("a[%d]=%d;\n",tot,i);
+		}
+	}
+	return 0;
+}  */
+
+int main()
+{
+	int a[25];        //打表
+	int judge = 0;
+	a[0] = 2;
+	a[1] = 3;
+	a[2] = 5;
+	a[3] = 7;
+	a[4] = 11;
+	a[5] = 13;
+	a[6] = 17;
+	a[7] = 19;
+	a[8] = 23;
+	a[9] = 29;
+	a[10] = 31;
+	a[11] = 37;
+	a[12] = 41;
+	a[13] = 43;
+	a[14] = 47;
+	a[15] = 53;
+	a[16] = 59;
+	a[17] = 61;
+	a[18] = 67;
+	a[19] = 71;
+	a[20] = 73;
+	a[21] = 79;
+	a[22] = 83;
+	a[23] = 89;
+	a[24] = 97;
+	for (int i = 4; i <=100; i+=2)
+	{
+		for (int j = 0; j < 25; j++)
+		{
+			for (int k = 0; k < 25; k++)
+			{
+				if (a[j] + a[k] == i)
+				{
+					judge = 1;
+					break;
+				}
+			}
+			if (judge==1)
+			{
+				cout << i << "满足哥德巴赫猜想" << endl;
+				break;
+			}
+			else if (judge==0)
+			{
+				return -1;
+				printf("Goldbach do not exists");
+			}
+		judge = 0;
+	}
+    return 0;
+}
+
diff --git a/Running Letter.c b/Running Letter.c
new file mode 100644
index 00000000..ece4e0aa
--- /dev/null
+++ b/Running Letter.c	
@@ -0,0 +1,34 @@
+#include <stdio.h>
+#include <windows.h>
+
+int main(int argc, char** argv)
+{
+	int i = 0;
+	int j = 0;
+	while (1)
+	{
+		printf("R");
+		Sleep(30);
+		system("cls");
+		int op = 1;
+		for (i = 0; i<79&&i>=0; i+=op)
+		{
+			for (j = 0; j < i; j++)
+			{
+				printf(" ");
+			}
+			printf("R");
+			Sleep(30);
+			system("cls");
+			if (i == 78)
+			{
+				op = -1;
+			}
+			if (i == 0)
+			{
+				op = 1;
+			}
+		}
+	}
+	return 0;
+}
\ No newline at end of file
diff --git a/allPrimes.c b/allPrimes.c
new file mode 100644
index 00000000..5ab0fa57
--- /dev/null
+++ b/allPrimes.c
@@ -0,0 +1,207 @@
+#include <stdio.h>
+#include <time.h>
+#include <math.h>
+/*int pd(int n)
+{
+	for(int i=2;i<=sqrt(n);i++)                    //此程序用来打表 
+	{
+		if(n%i==0)
+		return 0;
+	}
+	return 1;
+}
+
+
+int main(int argc, char** argv) 
+{
+	int a[1000];
+	int tot=0;
+	printf("a[0]=2\n");
+	for(int i=3;i<1000;i++)
+	{
+		if(pd(i))
+		{
+			a[tot++]=i;
+			printf("a[%d]=%d;\n",tot,i);
+		}
+	}
+	return 0;
+}  */
+int main()
+{
+	clock_t t1=clock();
+	int a[500];
+	a[0]=2;
+	a[1]=3;
+	a[2]=5;
+	a[3]=7;
+	a[4]=11;
+	a[5]=13;
+	a[6]=17;
+	a[7]=19;
+	a[8]=23;
+	a[9]=29;
+	a[10]=31;
+	a[11]=37;
+	a[12]=41;
+	a[13]=43;
+	a[14]=47;
+	a[15]=53;
+	a[16]=59;
+	a[17]=61;
+	a[18]=67;
+	a[19]=71;
+	a[20]=73;
+	a[21]=79;
+	a[22]=83;
+	a[23]=89;
+	a[24]=97;
+	a[25]=101;
+	a[26]=103;
+	a[27]=107;
+	a[28]=109;
+	a[29]=113;
+	a[30]=127;
+	a[31]=131;
+	a[32]=137;
+	a[33]=139;
+	a[34]=149;
+	a[35]=151;
+	a[36]=157;
+	a[37]=163;
+	a[38]=167;
+	a[39]=173;
+	a[40]=179;
+	a[41]=181;
+	a[42]=191;
+	a[43]=193;
+	a[44]=197;
+	a[45]=199;
+	a[46]=211;
+	a[47]=223;
+	a[48]=227;
+	a[49]=229;
+	a[50]=233;
+	a[51]=239;
+	a[52]=241;
+	a[53]=251;
+	a[54]=257;
+	a[55]=263;
+	a[56]=269;
+	a[57]=271;
+	a[58]=277;
+	a[59]=281;
+	a[60]=283;
+	a[61]=293;
+	a[62]=307;
+	a[63]=311;
+	a[64]=313;
+	a[65]=317;
+	a[66]=331;
+	a[67]=337;
+	a[68]=347;
+	a[69]=349;
+	a[70]=353;
+	a[71]=359;
+	a[72]=367;
+	a[73]=373;
+	a[74]=379;
+	a[75]=383;
+	a[76]=389;
+	a[77]=397;
+	a[78]=401;
+	a[79]=409;
+	a[80]=419;
+	a[81]=421;
+	a[82]=431;
+	a[83]=433;
+	a[84]=439;
+	a[85]=443;
+	a[86]=449;
+	a[87]=457;
+	a[88]=461;
+	a[89]=463;
+	a[90]=467;
+	a[91]=479;
+	a[92]=487;
+	a[93]=491;
+	a[94]=499;
+	a[95]=503;
+	a[96]=509;
+	a[97]=521;
+	a[98]=523;
+	a[99]=541;
+	a[100]=547;
+	a[101]=557;
+	a[102]=563;
+	a[103]=569;
+	a[104]=571;
+	a[105]=577;
+	a[106]=587;
+	a[107]=593;
+	a[108]=599;
+	a[109]=601;
+	a[110]=607;
+	a[111]=613;
+	a[112]=617;
+	a[113]=619;
+	a[114]=631;
+	a[115]=641;
+	a[116]=643;
+	a[117]=647;
+	a[118]=653;
+	a[119]=659;
+	a[120]=661;
+	a[121]=673;
+	a[122]=677;
+	a[123]=683;
+	a[124]=691;
+	a[125]=701;
+	a[126]=709;
+	a[127]=719;
+	a[128]=727;
+	a[129]=733;
+	a[130]=739;
+	a[131]=743;
+	a[132]=751;
+	a[133]=757;
+	a[134]=761;
+	a[135]=769;
+	a[136]=773;
+	a[137]=787;
+	a[138]=797;
+	a[139]=809;
+	a[140]=811;
+	a[141]=821;
+	a[142]=823;
+	a[143]=827;
+	a[144]=829;
+	a[145]=839;
+	a[146]=853;
+	a[147]=857;
+	a[148]=859;
+	a[149]=863;
+	a[150]=877;
+	a[151]=881;
+	a[152]=883;
+	a[153]=887;
+	a[154]=907;
+	a[155]=911;
+	a[156]=919;
+	a[157]=929;
+	a[158]=937;
+	a[159]=941;
+	a[160]=947;
+	a[161]=953;
+	a[162]=967;
+	a[163]=971;
+	a[164]=977;
+	a[165]=983;
+	a[166]=991;
+	a[167]=997;
+	for(int i=0;i<168;i++)
+		printf("%d ",a[i]);
+	clock_t t2=clock();
+	printf("\nrunning this program costs %d milliseconds\n",t2-t1);
+	return 0;
+}
diff --git a/hanio.c b/hanio.c
new file mode 100644
index 00000000..1e13eb2d
--- /dev/null
+++ b/hanio.c
@@ -0,0 +1,26 @@
+#include <stdio.h>  
+//第一个塔为初始塔，中间的塔为借用塔，最后一个塔为目标塔  
+int i=1;//记录步数  
+void move(int n,char from,char to) //将编号为n的盘子由from移动到to  
+{printf("第%d步:将%d号盘子%c---->%c\n",i++,n,from,to);  
+}  
+void hanoi(int n,char from,char denpend_on,char to) 
+{  
+    if (n==1)  
+    move(1,from,to);//
+    else  
+    {  
+      hanoi(n-1,from,to,denpend_on);
+      move(n,from,to);                
+      hanoi(n-1,denpend_on,from,to);
+    }  
+}  
+void main()  
+{  
+     printf("请输入盘子的个数:\n");  
+     int n;  
+     scanf("%d",&n);  
+     char x='A',y='B',z='C';  
+     printf("盘子移动情况如下:\n");  
+     hanoi(n,x,y,z);  
+}
diff --git a/maze.c b/maze.c
new file mode 100644
index 00000000..24995966
--- /dev/null
+++ b/maze.c
@@ -0,0 +1,97 @@
+#include <stdio.h> 
+#include <time.h>
+#include <conio.h>
+#include <windows.h>
+#include <stdlib.h>
+
+int map[25][25] = {
+	{ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1 },
+	{ 2,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0 },
+	{ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1 },
+};
+int i, j;
+void print()
+{
+	for (i = 0; i < 25; i++)
+	{
+		for (j = 0; j < 25; j++)
+		{
+			if (map[i][j] == 1)
+				printf("#");
+			if (map[i][j] == 0)
+				printf(" ");
+			if (map[i][j] == 2)
+				printf("E");
+			if (j == 24)
+			{
+				printf("\n");
+			}
+		}
+	}
+}
+int main()
+{
+	print();
+	int m = 1, n = 0;
+	while (m!=24&&n!=23)
+	{
+		if (GetKeyState(VK_UP) < 0&& map[m - 1][n]==0)
+		{
+			map[m - 1][n] = 2;
+			map[m][n] = 0;
+			--m;
+			system("cls");
+			print();
+		}
+		if (GetKeyState(VK_DOWN) < 0 && map[m + 1][n] == 0)
+		{
+			map[m + 1][n] = 2;
+			map[m][n] = 0;
+			++m;
+			system("cls");
+			print();
+		}
+		if (GetKeyState(VK_LEFT) < 0 && map[m][n-1] == 0)
+		{
+			map[m][n - 1] = 2;
+			map[m][n] = 0;
+			--n;
+			system("cls");
+			print();
+		}
+		if (GetKeyState(VK_RIGHT) < 0 && map[m][n+1] == 0)
+		{
+			map[m][n + 1] = 2;
+			map[m][n] = 0;
+			++n;
+			system("cls");
+			print();
+		}
+	}
+	system("cls");
+	printf("You win!");
+    return 0;
+}
+
diff --git a/narcissus.c b/narcissus.c
new file mode 100644
index 00000000..eb706454
--- /dev/null
+++ b/narcissus.c
@@ -0,0 +1,12 @@
+#include <iostream>
+#include <math.h>
+using namespace std;
+int main(int argc, char** argv) 
+{
+	for(int i=100;i<1000;i++)
+	{
+		if((pow(i/100,3)+pow(i%100/10,3)+pow(i%100%10,3)==i))
+		cout<<i<<"为水仙花数"<<endl;
+	}		
+	return 0;
+}
diff --git a/practices/c/level1/p01_runningLetter/Running Letter.c b/practices/c/level1/p01_runningLetter/Running Letter.c
new file mode 100644
index 00000000..2d8f98ca
--- /dev/null
+++ b/practices/c/level1/p01_runningLetter/Running Letter.c	
@@ -0,0 +1,29 @@
+#include <iostream>
+#include <windows.h>
+int main(int argc, char** argv)
+ {
+ 	while(1)
+ 	{
+	 
+		printf("R");
+	 	Sleep(30);
+		system("cls");
+		for(int i=0;i<79;i++)
+		{
+			for(int j=0;j<i;j++)
+				printf(" ");	
+			printf("R");
+			Sleep(30);
+			system("cls");
+		}
+		for(int i=79;i>=0;i--)
+		{
+			for(int j=0;j<i;j++)
+				printf(" ");
+			printf("R");
+			Sleep(30);
+			system("cls");
+		}
+	}
+	return 0;
+}
diff --git a/practices/c/level1/p09_maze/maze.c b/practices/c/level1/p09_maze/maze.c
new file mode 100644
index 00000000..24995966
--- /dev/null
+++ b/practices/c/level1/p09_maze/maze.c
@@ -0,0 +1,97 @@
+#include <stdio.h> 
+#include <time.h>
+#include <conio.h>
+#include <windows.h>
+#include <stdlib.h>
+
+int map[25][25] = {
+	{ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1 },
+	{ 2,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1 },
+	{ 1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0 },
+	{ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1 },
+};
+int i, j;
+void print()
+{
+	for (i = 0; i < 25; i++)
+	{
+		for (j = 0; j < 25; j++)
+		{
+			if (map[i][j] == 1)
+				printf("#");
+			if (map[i][j] == 0)
+				printf(" ");
+			if (map[i][j] == 2)
+				printf("E");
+			if (j == 24)
+			{
+				printf("\n");
+			}
+		}
+	}
+}
+int main()
+{
+	print();
+	int m = 1, n = 0;
+	while (m!=24&&n!=23)
+	{
+		if (GetKeyState(VK_UP) < 0&& map[m - 1][n]==0)
+		{
+			map[m - 1][n] = 2;
+			map[m][n] = 0;
+			--m;
+			system("cls");
+			print();
+		}
+		if (GetKeyState(VK_DOWN) < 0 && map[m + 1][n] == 0)
+		{
+			map[m + 1][n] = 2;
+			map[m][n] = 0;
+			++m;
+			system("cls");
+			print();
+		}
+		if (GetKeyState(VK_LEFT) < 0 && map[m][n-1] == 0)
+		{
+			map[m][n - 1] = 2;
+			map[m][n] = 0;
+			--n;
+			system("cls");
+			print();
+		}
+		if (GetKeyState(VK_RIGHT) < 0 && map[m][n+1] == 0)
+		{
+			map[m][n + 1] = 2;
+			map[m][n] = 0;
+			++n;
+			system("cls");
+			print();
+		}
+	}
+	system("cls");
+	printf("You win!");
+    return 0;
+}
+
diff --git a/practices/c/level1/p10_pushBoxes/pushbox.c b/practices/c/level1/p10_pushBoxes/pushbox.c
new file mode 100644
index 00000000..e6aa3c6c
--- /dev/null
+++ b/practices/c/level1/p10_pushBoxes/pushbox.c
@@ -0,0 +1,226 @@
+// pushbox.cpp : 定义控制台应用程序的入口点。
+
+
+#include "stdafx.h"
+#include <windows.h>
+int a[6][6];
+int i = 0, j = 0;
+int level;
+int levelNum = 0;
+int scan(int n,const char b[6])
+{
+	FILE* fp = fopen(b, "r");
+	if (fp == NULL)
+	{
+		printf("Files not found");
+		return -1;
+	}
+	for (i = 0; i<n; i++)
+	{
+		for (j = 0; j<n; j++)
+		{
+			fscanf(fp, "%d", &a[i][j]);
+		}
+		fscanf(fp, "\n");
+	}
+	fclose(fp);
+	return 0;
+}
+void choice()
+{
+	printf("Select the level:1-2\n");
+	scanf("%d", &levelNum);
+	if (levelNum == 1)
+	{
+		scan(6, "1.txt");
+	}
+	else if (levelNum == 2)
+	{
+		scan(6, "2.txt");
+	}
+	else
+	{
+		printf("Your Input is Wrong!");
+	}
+}
+void print()
+{
+	system("cls");
+	for (i = 0; i<6; i++)
+	{
+		for (j = 0; j<6; j++)
+		{
+			if (a[i][j] == 0)
+			{
+				printf("*");
+			}
+			else if (a[i][j] == 1)
+			{
+				printf(" ");
+			}
+			else if (a[i][j] == 3)
+			{
+				printf("M");
+			}
+			else if (a[i][j] == 4)
+			{
+				printf("B");
+			}
+			else if (a[i][j] == 5)
+			{
+				printf("D");
+			}
+			if (j == 5)
+			{
+				printf("\n");
+			}
+		}
+	}
+}
+int score = 1000;
+int m = 1, n = 2;
+int p = 1, q = 4;
+
+int main(int argc, char** argv) {
+	choice();
+	print();
+	while (1)
+	{
+		if (GetKeyState(VK_UP)<0 && (a[m - 1][n] == 1 || a[m - 1][n] == 4))
+		{
+			if (a[m - 1][n] == 1)
+			{
+				a[m - 1][n] = 3;
+				a[m][n] = 1;
+				--m;
+			}
+			else if (a[m - 1][n] == 4)
+			{
+				if (a[m - 2][n] == 1)
+				{
+					a[m - 2][n] = 4;
+					a[m - 1][n] = 3;
+					a[m][n] = 1;
+					--m;
+				}
+				else if (a[m - 2][n] == 5)
+				{
+					a[m - 2][n] = 4;
+					a[m - 1][n] = 3;
+					a[m][n] = 1;
+					--m;
+				}
+			}
+			if (a[2][4] == 1)
+			{
+				a[2][4] = 5;
+			}
+			print();
+		}
+
+		if (GetKeyState(VK_DOWN)<0 && (a[m + 1][n] == 1 || a[m + 1][n] == 4))
+		{
+			if (a[m + 1][n] == 1)
+			{
+				a[m + 1][n] = 3;
+				a[m][n] = 1;
+				++m;
+			}
+			else if (a[m + 1][n] == 4)
+			{
+				if (a[m + 2][n] == 1)
+				{
+					a[m + 2][n] = 4;
+					a[m + 1][n] = 3;
+					a[m][n] = 1;
+					++m;
+				}
+				else if (a[m + 2][n] == 5)
+				{
+					a[m + 2][n] = 4;
+					a[m + 1][n] = 3;
+					a[m][n] = 1;
+					++m;
+				}
+			}
+			if (a[2][4] == 1)
+			{
+				a[2][4] = 5;
+			}
+			print();
+		}
+
+		if (GetKeyState(VK_LEFT)<0 && (a[m][n - 1] == 1 || a[m][n - 1] == 4))
+		{
+			if (a[m][n - 1] == 1)
+			{
+				a[m][n - 1] = 3;
+				a[m][n] = 1;
+				--n;
+			}
+			else if (a[m][n - 1] == 4)
+			{
+				if (a[m][n - 2] == 1)
+				{
+					a[m][n - 2] = 4;
+					a[m][n - 1] = 3;
+					a[m][n] = 1;
+					--n;
+				}
+				else if (a[m][n - 2] == 5)
+				{
+					a[m][n-2] = 4;
+					a[m][n-1] = 3;
+					a[m][n] = 1;
+					--n;
+				}
+			}
+			if (a[2][4] == 1)
+			{
+				a[2][4] = 5;
+			}
+			print();
+		}
+
+		if (GetKeyState(VK_RIGHT)<0 && (a[m][n + 1] == 1 || a[m][n + 1] == 4))
+		{
+			if (a[m][n + 1] == 1)
+			{
+				a[m][n + 1] = 3;
+				a[m][n] = 1;
+				++n;
+			}
+			else if (a[m][n + 1] == 4)
+			{
+				if (a[m][n + 2] == 1)
+				{
+					a[m][n + 2] = 4;
+					a[m][n + 1] = 3;
+					a[m][n] = 1;
+					++n;
+				}
+				else if (a[m][n + 2] == 5)
+				{
+					a[m][n+2] = 4;
+					a[m][n+1] = 3;
+					a[m][n] = 1;
+					++n;
+				}
+			}
+			if (a[2][4] == 1)
+			{
+				a[2][4] = 5;
+			}
+			print();
+		}
+		Sleep(100);
+		if (a[1][4] != 5 && a[2][4] != 5 && a[2][4] != 3)
+		{
+			system("cls");
+			printf("You Win!\nYour score is %d\n",score);
+			return 0;
+		}
+		score--;
+	}
+	return 0;
+}
diff --git a/practices/c/level1/p11_linkedList/link.c b/practices/c/level1/p11_linkedList/link.c
new file mode 100644
index 00000000..6041889d
--- /dev/null
+++ b/practices/c/level1/p11_linkedList/link.c
@@ -0,0 +1,148 @@
+#include "stdafx.h"
+
+#include "stdlib.h"   
+
+#define LEN sizeof(struct student)  
+
+struct student
+{
+	int num;              //学号   
+	float value;          //分数，其他信息可以继续在下面增加字段  
+	struct student *next;       //指向下一节点的指针  
+};
+
+int n;
+int a[100] = { 0 };
+
+struct student *Create()
+{
+	struct student *head;       //头节点  
+	struct student *p1 = NULL;  //p1保存创建的新节点的地址  
+	struct student *p2 = NULL;  //p2保存原链表最后一个节点的地址  
+
+	n = 0;          //创建前链表的节点总数为0：空链表  
+	p1 = (struct student *) malloc(LEN);   //开辟一个新节点  
+	p2 = p1;            //如果节点开辟成功，则p2先把它的指针保存下来以备后用  
+
+	if (p1 == NULL)        //节点开辟不成功  
+	{
+		printf("\nCann't create it, try it again in a moment!\n");
+		return NULL;
+	}
+	else                //节点开辟成功  
+	{
+		head = NULL;        //开始head指向NULL  
+		printf("Please input %d node -- num,value: ", n + 1);
+		scanf("%d %f", &(p1->num), &(p1->value));    //录入数据  
+	}
+	while (p1->num != 0)      //只要学号不为0，就继续录入下一个节点  
+	{
+		n += 1;         //节点总数增加1个  
+		if (n == 1)      //如果节点总数是1，则head指向刚创建的节点p1  
+		{
+			head = p1;
+			p2->next = NULL;  //此时的p2就是p1,也就是p1->next指向NULL。  
+		}
+		else
+		{
+			p2->next = p1;   //指向上次下面刚刚开辟的新节点  
+		}
+
+		p2 = p1;            //把p1的地址给p2保留，然后p1产生新的节点  
+
+		p1 = (struct student *) malloc(LEN);
+		printf("Please input %d node -- num,value: ", n + 1);
+		scanf("%d %f", &(p1->num), &(p1->value));
+	}
+	p2->next = NULL;     //此句就是根据单向链表的最后一个节点要指向NULL  
+
+	free(p1);           //p1->num为0的时候跳出了while循环，并且释放p1  
+	p1 = NULL;          //特别不要忘记把释放的变量清空置为NULL,否则就变成"野指针"，即地址不确定的指针  
+	return head;        //返回创建链表的头指针   
+}
+
+struct student *reverse(struct student *head)
+{
+	struct student *p;      //临时存储  
+	struct student *p1;     //存储返回结果  
+	struct student *p2;     //源结果节点一个一个取  
+
+	p1 = NULL;          //开始颠倒时，已颠倒的部分为空  
+	p2 = head;          //p2指向链表的头节点  
+	while (p2 != NULL)
+	{
+		p = p2->next;
+		p2->next = p1;
+		p1 = p2;
+		p2 = p;
+	}
+	head = p1;
+	return head;
+}
+
+void search(int n,struct student *head)
+{
+	struct student *p1=head;
+	struct student *p2=head;
+	struct student *p;
+	int tot = 0;
+	while (p1!=NULL)
+	{
+		if (p1->value == n)
+		{
+			a[tot++]= p1->num;
+		}
+		p = p1;
+		p2 = p;
+		p1 = p2->next;
+	}
+	a[tot]=-1;
+}
+int main(int argc, char *argv[])
+{
+	struct student *head;
+	printf("Take turns to input the value\nIf you want to stop,input 0 0\n");
+	head = Create();
+	int judge;
+	while (1)
+	{
+		a[100] = { 0 };
+		int judge2 = 0, i = 0, number = 0;
+		printf("What do you what to do?\n1:Reverse  2:Search  -1:quit\n");
+		scanf("%d", &judge);
+		if (judge == 1)
+		{
+			head=reverse(head);
+			printf("Operation succeeded!");
+		}
+		else if (judge == 2)
+		{
+			printf("Input the number you want to search\n");
+			scanf("%d", &number);
+			search(number, head);
+			while (a[i] != -1&&a[i]!=0)
+			{
+				printf("No.%d's value is %d\n", a[i], number);
+				++i;
+				judge2 = 1;
+			}
+			if (judge2 == 0)
+			{
+				printf("-1\nComplete\n");
+			}
+			else
+			{
+				printf("Complete\n");
+			}
+		}
+		else if (judge == -1)
+		{
+			return 0;
+		}
+		else
+		{
+			printf("Input Error!\nPlease input again!\n");
+		}
+	}
+	return 0;
+}
\ No newline at end of file
diff --git a/practices/c/level1/p12_warehouse/warehouse.c b/practices/c/level1/p12_warehouse/warehouse.c
new file mode 100644
index 00000000..792c0ebd
--- /dev/null
+++ b/practices/c/level1/p12_warehouse/warehouse.c
@@ -0,0 +1,95 @@
+#include <stdio.h>
+#include <conio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <windows.h>
+
+int n,m,v[1000];
+struct Data
+{
+	int num;
+	char name[10];
+};
+Data goods[1000],temp[1000];
+void loading();
+void saving(); 
+void working();
+int main()
+{
+	loading();
+	working();
+	saving();
+	return 0;
+}
+void loading()
+{
+	FILE *f=fopen("data.txt","r");
+	if(f==NULL)
+	{
+		printf("No data!\n");
+		return;
+	}
+	else 
+	{
+		fscanf(f,"%d",&n);
+		for (int i=1;i<=n;i++) 
+		{
+			fscanf(f,"%s %d",goods[i].name,&goods[i].num);
+		}
+	}
+	fclose(f);
+}
+void working()
+{
+	while (1) 
+	{
+		printf("1 show list\n");
+		printf("2 append\n");
+		printf("3 pop\n");
+		printf("4 exit\n");
+		char ch=getch();
+		if (ch<'1'||ch>'6')
+			continue;
+		int i,j,k=ch-'0';
+		if (k==1) {
+			for (i=1;i<=n;i++) 
+			{
+				printf("%d:%s %d\n",i,goods[i].name,goods[i].num);
+			}
+			Sleep(3000);
+		}
+	if (k==2) 
+	{
+		printf("Please input the number of goods you want to add:\n");
+		scanf("%d",&m); 
+		printf("Please input some goods:\n");
+		for (i=n+1;i<=n+m;i++)
+		{
+			scanf("%s %d",goods[i].name,&goods[i].num);
+		}
+		n+=m;
+	}
+	if (k==3) 
+	{
+		printf("Please input some goods:\n");
+
+			scanf("%d",&j);
+		for (i=1;i<=n-j;i++)
+		{
+			temp[j+i-1]=goods[j+i];
+			goods[j+i-1]=temp[j+i-1];
+		}
+	}
+	if (k==4)
+		break;
+	}
+}
+void saving()
+{
+		FILE *f=fopen("data.txt","w");
+	fprintf(f,"%d\n",n);
+	for (int i=1;i<=n;++i) {
+		fprintf(f,"%s %d\n",goods[i].name,goods[i].num);
+	}
+	fclose(f);
+}
diff --git a/practices/cpp/level1/p01_Queue/main_quene.cpp b/practices/cpp/level1/p01_Queue/main_quene.cpp
new file mode 100644
index 00000000..c31cb38c
--- /dev/null
+++ b/practices/cpp/level1/p01_Queue/main_quene.cpp
@@ -0,0 +1,13 @@
+#include<iostream>
+#include"Queue.h"
+using namespace std;
+
+int main()
+{
+	Queue queue;
+	while(!isFull())
+	{
+		append(100);
+	}
+	return 0;
+ } 
diff --git a/practices/cpp/level1/p01_Queue/queue.cpp b/practices/cpp/level1/p01_Queue/queue.cpp
new file mode 100644
index 00000000..f18d3862
--- /dev/null
+++ b/practices/cpp/level1/p01_Queue/queue.cpp
@@ -0,0 +1,35 @@
+#include "Queue.h"
+bool Queue::isFull()
+{
+	if(data[100]!=0)
+	{
+		return true;
+	}
+	else
+	return false;
+}
+bool Quene::isEmpty()
+{
+	return data==tail;
+} 
+void Queue::append(int item)
+{
+	if ((tail+1)%100==head) 
+	{
+		cout<<"Full!\n";
+		return;
+	}
+	tail++;
+	if (tail==MAXQUEUE)
+	tail=0;
+	data[tail]=item;
+}
+void Queue::pop()
+{
+	if (head!=tail) 
+	{
+		head++;
+		if (head==MAXQUEUE) 
+			head=0;
+	}
+}
diff --git a/practices/cpp/level1/p01_Queue/queue.h b/practices/cpp/level1/p01_Queue/queue.h
new file mode 100644
index 00000000..8f03fab9
--- /dev/null
+++ b/practices/cpp/level1/p01_Queue/queue.h
@@ -0,0 +1,17 @@
+#ifndef Queue_H
+#define Queue_H
+
+class Queue
+{
+	public:
+		bool isFull();
+		void append(int item);
+		bool isEmpty();
+	protected:
+	private:
+		int tail=0;
+		int head=0;
+		int data[100]={0};
+};
+
+#endif
diff --git a/practices/cpp/level1/p02_Stack/main_stack.cpp b/practices/cpp/level1/p02_Stack/main_stack.cpp
new file mode 100644
index 00000000..d1d9bd5a
--- /dev/null
+++ b/practices/cpp/level1/p02_Stack/main_stack.cpp
@@ -0,0 +1,18 @@
+#include <iostream>
+#include"stack.h"
+
+/* run this program using the console pauser or add your own getch, system("pause") or input loop */
+
+int main(int argc, char** argv) {
+	stack stack1;
+	stack1.push(123);
+	if(stack1.isEmpty()==1)
+	{
+		printf("The stack is empty");
+	}
+	else
+	{
+		printf("The stack is not empty");
+	}
+	return 0;
+}
diff --git a/practices/cpp/level1/p02_Stack/stack.cpp b/practices/cpp/level1/p02_Stack/stack.cpp
new file mode 100644
index 00000000..0e7cd379
--- /dev/null
+++ b/practices/cpp/level1/p02_Stack/stack.cpp
@@ -0,0 +1,26 @@
+#include "stack.h"
+void stack::push(int temp)
+{
+	data[tail]=temp;
+	tail++;
+}
+void stack::pop()
+{
+	tail--;
+}
+bool stack::isFull()
+{
+	if(data[MAXDATA]!=0)
+	{
+		return true;
+	}
+		return false;
+}
+bool stack::isEmpty()
+{
+	if(data[0]==0)
+	{
+		return true;
+	}
+	return false;
+}
diff --git a/practices/cpp/level1/p02_Stack/stack.h b/practices/cpp/level1/p02_Stack/stack.h
new file mode 100644
index 00000000..ce14fae7
--- /dev/null
+++ b/practices/cpp/level1/p02_Stack/stack.h
@@ -0,0 +1,18 @@
+#ifndef STACK_H
+#define STACK_H
+#define MAXDATA 100
+
+class stack
+{
+	public:
+		void push(int temp);
+		void pop();
+		bool isFull();
+		bool isEmpty();
+	private:
+		int data[100]={0};
+		int tail=0;
+		int head=0;
+};
+
+#endif
diff --git a/practices/cpp/level1/p03_SafeArray/safearray.cpp b/practices/cpp/level1/p03_SafeArray/safearray.cpp
new file mode 100644
index 00000000..1fae20cb
--- /dev/null
+++ b/practices/cpp/level1/p03_SafeArray/safearray.cpp
@@ -0,0 +1,40 @@
+#include "SafeArray.h"
+#include <cstdio>
+
+SafeArray::SafeArray()
+{
+	data=NULL;
+	totalLength=0;
+}
+
+SafeArray::~SafeArray()
+{
+	delete []data;
+	totalLength=0;
+	data=NULL;
+}
+
+void SafeArray::create(int length)
+{
+	totalLength=length;
+	data=new int[length];
+}
+
+bool SafeArray::write(int index,int number)
+{
+	if (index<0||index>=totalLength)
+	{
+		return false;
+	}
+	data[index]=number;
+	return true;
+}
+
+int SafeArray::read(int index){
+	if (index<0||index>=totalLength)
+	{
+		printf("越界");
+		return -1;
+	}
+	return data[index];
+}
diff --git a/practices/cpp/level1/p03_SafeArray/safearray.h b/practices/cpp/level1/p03_SafeArray/safearray.h
new file mode 100644
index 00000000..c0118967
--- /dev/null
+++ b/practices/cpp/level1/p03_SafeArray/safearray.h
@@ -0,0 +1,12 @@
+class SafeArray{
+	private:
+		int totalLength;
+		int *data;	
+	
+	public:
+		SafeArray();
+		~SafeArray();
+		void create(int length);
+		bool write(int index,int number);
+		int read(int index);
+};
diff --git a/practices/cpp/level1/p03_SafeArray/safearray_main.cpp b/practices/cpp/level1/p03_SafeArray/safearray_main.cpp
new file mode 100644
index 00000000..8f73e4ba
--- /dev/null
+++ b/practices/cpp/level1/p03_SafeArray/safearray_main.cpp
@@ -0,0 +1,11 @@
+#include<iostream>
+#include<safearray.h>
+using namespace std;
+
+int main()
+{
+	int length;
+	cin>>length;
+	SafeArray safearray;
+	safearray.create(length);
+ } 
diff --git a/practices/cpp/level1/p04_cppScoreManagement/CLASS.h b/practices/cpp/level1/p04_cppScoreManagement/CLASS.h
new file mode 100644
index 00000000..0579b778
--- /dev/null
+++ b/practices/cpp/level1/p04_cppScoreManagement/CLASS.h
@@ -0,0 +1,22 @@
+#ifndef CLASSES_H
+#define CLASSES_H
+
+#define MAXN 150
+class Classes
+{
+	private:
+		struct
+		{
+			char name[20];
+			char studentNumber[20];
+			int grade;
+		}student[151];
+		int totalNumber;
+	
+	public:
+		void showList();
+		void addStudent();
+		void deleteStudent();
+		void enteringGrade();
+};
+#endif 
diff --git a/practices/cpp/level1/p04_cppScoreManagement/class.cpp b/practices/cpp/level1/p04_cppScoreManagement/class.cpp
new file mode 100644
index 00000000..822e75ca
--- /dev/null
+++ b/practices/cpp/level1/p04_cppScoreManagement/class.cpp
@@ -0,0 +1,107 @@
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include "CLASS.h"
+
+void Classes::showList()
+{
+	for (int i=1;i<=totalNumber;i++)
+	{
+		if (student[i].name[0]!=0)
+		{
+			printf("%s   %s   %d\n",student[i].studentNumber,student[i].name,student[i].grade);		
+		}
+	}
+}
+		
+
+void Classes::deleteStudent()
+{
+	MAXN=150;
+	char tmpName[20],tmpNumber[20];
+	int order=0;
+	while(1)
+	{
+		if (totalNumber==0)
+		{
+			printf("Faliure!\n");
+			return;
+		}
+		loop:
+		printf("Input name & student number:");
+		scanf("%s %s",tmpName,tmpNumber);
+		for (int i=1;i<=totalNumber;i++)
+		{
+			if (strcmp(tmpName,student[i].studentNumber)==0)
+			{
+				totalNumber--;
+				student[i].name[0]=0;
+				goto loop; 
+			}
+		}
+		printf("Not Exist!\n");
+		printf("Continue？1=YES/0=NO\n");
+		scanf("%d",&order);
+		if (order==0)	break;
+	}
+}
+
+void Classes::enteringGrade(){
+	MAXN=150;
+	int tmpGrade=0,order=0;
+	char tmpName[20],tmpNumber[20];
+	while(1){
+		if (totalNumber==0){
+			printf("No info!\n");
+			return;
+		}
+		loop:
+		printf("Input Name & Number:");
+		scanf("%s %s",tmpName,tmpNumber);
+		for (int i=1;i<=totalNumber;i++){
+			if (strcmp(tmpName,student[i].studentNumber)==0){
+				printf("Input grade：");
+				scanf("%d",&tmpGrade);
+				student[i].grade=tmpGrade;
+				goto loop; 
+			}
+		}
+		printf("Not exist!\n");
+		printf("Continue？1=YES/0=NO\n");
+		scanf("%d",&order);
+		if (order==0)	break;
+	}
+}
+void Classes::addStudent(){
+	char tmpName[20],tmpNumber[20];
+	int order=0;
+	while(1)
+	{
+		if (totalNumber>=MAXN)
+		{
+			printf("Full!\n");
+			return;
+		}
+		loop:
+		printf("Input name&student number");
+		scanf("%s %s",tmpName,tmpNumber);
+		for (int i=1;i<=totalNumber;i++){
+			if (strcmp(tmpName,student[i].studentNumber)==0){
+				printf("Exists!\n");
+				goto loop; 
+			}
+		}
+		totalNumber++;
+		for (int i=1;i<=totalNumber;i++){
+			if (student[i].name[0]==0){
+				strcpy(student[i].name,tmpName);
+				strcpy(student[i].studentNumber,tmpNumber);
+				break;
+			}
+		}
+		printf("Continue？1=YES  0=NO\n");
+		scanf("%d",&order);
+		if (order==0)	break;
+	}
+}
+
diff --git a/practices/cpp/level1/p04_cppScoreManagement/main_class.cpp b/practices/cpp/level1/p04_cppScoreManagement/main_class.cpp
new file mode 100644
index 00000000..634b9643
--- /dev/null
+++ b/practices/cpp/level1/p04_cppScoreManagement/main_class.cpp
@@ -0,0 +1,31 @@
+#include <iostream>
+#include <cstring>
+#include "Classes.h"
+using namespace std;
+
+int main()
+{
+	int a;
+	scanf("%d",a);
+	while(1)
+	{
+		
+		cout<<"1:showlist\n2:add student\n3:delete student\n4:entering"<<endl;
+		if(a==1){
+			showList();
+		}
+		if(a==2){
+			addStudent()
+		}
+		if(a==3){
+			deleteStudent();
+		};
+		if(a==4){
+			enteringGrade();
+		}
+		if(a==5){
+			break;
+		}
+	}
+	return 0;
+}
diff --git a/practices/cpp/level1/p07_Circuit/Cell.cpp b/practices/cpp/level1/p07_Circuit/Cell.cpp
new file mode 100644
index 00000000..9bbec68f
--- /dev/null
+++ b/practices/cpp/level1/p07_Circuit/Cell.cpp
@@ -0,0 +1,42 @@
+#include "../include/Cell.h"
+
+Switch::Switch()
+{
+	isPassable = 0;
+	isSwitch = 1;
+}
+void Switch::turnon()
+{
+	this->isPassable = 1;
+}
+void Switch::turnoff()
+{
+	this->isPassable = 0;
+}
+
+Fan::Fan()
+{
+	isPassable = 1;
+	rotateSpeed = 10;
+	isSwitch = 0;
+}
+void Fan::turnon(){
+	isPassable = 1;
+}
+void Fan::turnoff(){
+	isPassable = 0;
+}
+
+Bulb::Bulb()
+{
+	isPassable = 1;
+	light = 10;
+	isSwitch = 0;
+}
+
+void Bulb::turnon(){
+	isPassable = 1;
+}
+void Bulb::turnoff(){
+	isPassable = 0;
+}
diff --git a/practices/cpp/level1/p07_Circuit/Cell.h b/practices/cpp/level1/p07_Circuit/Cell.h
new file mode 100644
index 00000000..9ab18352
--- /dev/null
+++ b/practices/cpp/level1/p07_Circuit/Cell.h
@@ -0,0 +1,50 @@
+#ifndef CELL_H
+#define CELL_H
+
+
+class Cell
+{
+	public:
+		Cell()
+		{
+			isPassable = 0;
+		}
+		virtual void turnon()=0;
+		virtual void turnoff()=0;
+		bool isSwitch;
+    protected:
+        bool isPassable;
+};
+
+class Switch : public Cell
+{
+    public:
+        Switch();
+        void turnon();
+        void turnoff();
+};
+
+
+class Fan : public Cell
+{
+    public:
+        Fan();
+        void turnon();
+        void turnoff();
+        int getRotateSpeed();
+	private:
+        int rotateSpeed;
+};
+
+class Bulb : public Cell
+{
+	public:
+		Bulb();
+		void turnon();
+		void turnoff();
+		int getLight();
+	private:
+		int light;
+};
+
+#endif // CELL_H
diff --git a/practices/cpp/level1/p07_Circuit/Circuit.cpp b/practices/cpp/level1/p07_Circuit/Circuit.cpp
new file mode 100644
index 00000000..59451dfd
--- /dev/null
+++ b/practices/cpp/level1/p07_Circuit/Circuit.cpp
@@ -0,0 +1,25 @@
+#include "Circuit.h"
+using namespace std;
+
+void Circuit::addCell(Cell* cell)
+{
+	Element.push_back(cell);
+}
+
+void Circuit::on()
+{
+	for(unsigned i=0;i != Element.size();i++)
+	{
+			Element[i]->turnon();
+	}
+}
+
+void Circuit::off()
+{
+	for(unsigned i=0;i != Element.size();i++)
+	{
+			Element[i]->turnoff();
+	}
+}
+
+
diff --git a/practices/cpp/level1/p07_Circuit/Circuit.h b/practices/cpp/level1/p07_Circuit/Circuit.h
new file mode 100644
index 00000000..60e49eab
--- /dev/null
+++ b/practices/cpp/level1/p07_Circuit/Circuit.h
@@ -0,0 +1,17 @@
+#ifndef CIRCUIT_H
+#define CIRCUIT_H
+#include "Cell.h"
+#include <vector>
+using namespace std;
+
+class Circuit
+{
+	public:
+		void addCell(Cell* cell);
+        void off();
+        void on();
+	private:
+		vector<Cell*> Element;
+};
+
+#endif // CIRCUIT_H
diff --git a/practices/cpp/level1/p07_Circuit/main.cpp b/practices/cpp/level1/p07_Circuit/main.cpp
new file mode 100644
index 00000000..8812fea1
--- /dev/null
+++ b/practices/cpp/level1/p07_Circuit/main.cpp
@@ -0,0 +1,18 @@
+#include <iostream>
+#include "Cell.h"
+#include "Circuit.h"
+using namespace std;
+
+
+
+int main()
+{
+	Circuit circuit;
+	Fan f1,f2;
+	Bulb b1,b2;
+	circuit.addCell(&f1);
+	circuit.addCell(&b2);
+	circuit.on();
+	circuit.off();
+	return 0;
+}
diff --git a/practices/cpp/level1/p08_EmployeeAndSales/Employee.cpp b/practices/cpp/level1/p08_EmployeeAndSales/Employee.cpp
new file mode 100644
index 00000000..1f82adff
--- /dev/null
+++ b/practices/cpp/level1/p08_EmployeeAndSales/Employee.cpp
@@ -0,0 +1,24 @@
+#include "Employee.h"
+
+Employee::Employee(int t_level=1)
+{
+	level = t_level;
+}
+
+double Employee::getSalary()
+{
+	salary = level * 1000;
+	return salary;
+}
+
+Sales::Sales(int t_level = 1,double t_salesValue = 6000)
+{
+	level = t_level;
+	salesValue = t_salesValue;
+}
+
+double Sales::getSalary()
+{
+	salary = salesValue*0.2 + level * 1000.0;
+	return salary;
+}
diff --git a/practices/cpp/level1/p08_EmployeeAndSales/Employee.h b/practices/cpp/level1/p08_EmployeeAndSales/Employee.h
new file mode 100644
index 00000000..b2db1809
--- /dev/null
+++ b/practices/cpp/level1/p08_EmployeeAndSales/Employee.h
@@ -0,0 +1,25 @@
+#ifndef EMPLOYEE_H
+#define EMPLOYEE_H
+#include<string>
+
+class Employee
+{
+	public:
+		Employee(int t_level);
+		std::string name;
+		unsigned age;
+		int level;
+		virtual double getSalary();
+	protected:
+		double salary;
+};
+
+class Sales : public Employee
+{
+	public:
+		Sales(int t_level,double t_salesValue);
+		double getSalary();
+	private:
+		double salesValue;
+};
+#endif // EMPLOYEE_H
diff --git a/practices/cpp/level1/p08_EmployeeAndSales/main.cpp b/practices/cpp/level1/p08_EmployeeAndSales/main.cpp
new file mode 100644
index 00000000..6f81451f
--- /dev/null
+++ b/practices/cpp/level1/p08_EmployeeAndSales/main.cpp
@@ -0,0 +1,12 @@
+#include <iostream>
+#include "Employee.h"
+using namespace std;
+
+int main()
+{
+	Sales s1 = Sales(5,6000);
+	Employee e1 = Employee(6);
+	double e1_salary = e1.getSalary();
+	double s1_salary = s1.getSalary();
+	cout<<e1_salary<<endl<<s1_salary<<endl;
+}
diff --git a/practices/cpp/level1/p09_Tree/Tree.cpp b/practices/cpp/level1/p09_Tree/Tree.cpp
new file mode 100644
index 00000000..606ca1ad
--- /dev/null
+++ b/practices/cpp/level1/p09_Tree/Tree.cpp
@@ -0,0 +1,55 @@
+#include "Tree.h"
+#define NULL 0
+Tree::Tree()
+{
+	sonNode = NULL;
+	brotherNode = NULL;
+}
+
+
+Tree::Tree(int tvalue)
+{
+	value = tvalue;
+	sonNode = NULL;
+	brotherNode = NULL;
+}
+
+Tree::~Tree()
+{
+	if(this != NULL)
+	{
+		delete this;
+	}
+}
+void Tree::appendSon(int tvalue)
+{
+	this->sonNode = new Tree;
+	sonNode->value = tvalue;
+	sonNode->brotherNode = NULL;
+	sonNode->sonNode = NULL;
+}
+
+void Tree::appendBrother(int tvalue)
+{
+	this->brotherNode = new Tree;
+	brotherNode->value = tvalue;
+	brotherNode->brotherNode = NULL;
+	brotherNode->sonNode = NULL;
+}
+
+int Tree::calculate()
+{
+	int sum = 0;
+	Tree* tNode = this->sonNode;
+	while(tNode)
+	{
+		sum++;
+		tNode = tNode->sonNode;
+	}
+	return sum;
+}
+
+int Tree::getValue()
+{
+	return value;
+}
diff --git a/practices/cpp/level1/p09_Tree/Tree.h b/practices/cpp/level1/p09_Tree/Tree.h
new file mode 100644
index 00000000..688b9043
--- /dev/null
+++ b/practices/cpp/level1/p09_Tree/Tree.h
@@ -0,0 +1,21 @@
+#ifndef TREE_H
+#define TREE_H
+
+
+class Tree
+{
+	public:
+		Tree();
+		Tree(int tvalue);
+		~Tree();
+		Tree* sonNode;
+		Tree* brotherNode;
+		void appendSon(int tvalue);
+		void appendBrother(int tvalue);
+		int calculate();
+		int getValue();
+	private:
+		int value;
+};
+
+#endif // TREE_H
diff --git a/practices/cpp/level1/p09_Tree/main.cpp b/practices/cpp/level1/p09_Tree/main.cpp
new file mode 100644
index 00000000..b3b75bb0
--- /dev/null
+++ b/practices/cpp/level1/p09_Tree/main.cpp
@@ -0,0 +1,14 @@
+#include <iostream>
+#include "Tree.h"
+using namespace std;
+
+int main()
+{
+	Tree root = Tree(0);
+	root.appendSon(15);
+	root.appendBrother(20);
+	root.sonNode->appendSon(10);
+	int sum = root.calculate();
+	cout<<sum<<endl;
+	return 0;
+}
diff --git a/practices/cpp/level1/p11_Fighters/Bullet.cpp b/practices/cpp/level1/p11_Fighters/Bullet.cpp
new file mode 100644
index 00000000..d35744f9
--- /dev/null
+++ b/practices/cpp/level1/p11_Fighters/Bullet.cpp
@@ -0,0 +1,11 @@
+#include "Bullet.h"
+Bullet::Bullet(int type){
+	this->type = type;
+}
+int Bullet::getType(){
+	return type;
+}
+Bullet::Bullet(const Bullet& bullet){
+	this->type = bullet.type;
+	this->setTexture(*bullet.getTexture());
+}
\ No newline at end of file
diff --git a/practices/cpp/level1/p11_Fighters/Bullet.h b/practices/cpp/level1/p11_Fighters/Bullet.h
new file mode 100644
index 00000000..6c12eda3
--- /dev/null
+++ b/practices/cpp/level1/p11_Fighters/Bullet.h
@@ -0,0 +1,16 @@
+#ifndef BULLET_H
+#define BULLET_H
+#include <SFML/Graphics.hpp>
+#include <SFML/Audio.hpp>
+#define HERO_BULLET 1
+#define ENEMY_BULLET 2
+class Bullet:public sf::Sprite{
+public:
+	Bullet(){};
+	Bullet(const Bullet& bullet);
+	Bullet(int type);
+	int getType();
+private:
+	int type;
+};
+#endif
\ No newline at end of file
diff --git a/practices/cpp/level1/p11_Fighters/Controller.cpp b/practices/cpp/level1/p11_Fighters/Controller.cpp
new file mode 100644
index 00000000..384ee9cb
--- /dev/null
+++ b/practices/cpp/level1/p11_Fighters/Controller.cpp
@@ -0,0 +1,21 @@
+#include "Controller.h"
+
+void Controller::control(Plane &plane){
+	if((sf::Keyboard::isKeyPressed(sf::Keyboard::Up)) && (plane.getPosition().y - plane.getTexture()->getSize().y / 2 > 0)){
+		plane.move(0, -SPEED);
+	}
+	if((sf::Keyboard::isKeyPressed(sf::Keyboard::Down)) && (plane.getPosition().y + plane.getTexture()->getSize().y / 2 < 800)){
+		plane.move(0, SPEED);
+	}
+
+	if((sf::Keyboard::isKeyPressed(sf::Keyboard::Left)) && (plane.getPosition().x - plane.getTexture()->getSize().x / 2 > 0)){
+		plane.move(-SPEED, 0);
+	}
+
+	if((sf::Keyboard::isKeyPressed(sf::Keyboard::Right)) && (plane.getPosition().x + plane.getTexture()->getSize().x / 2 < 480)){
+		plane.move(SPEED, 0);
+	}
+	if(sf::Keyboard::isKeyPressed(sf::Keyboard::Space)){
+		plane.fire();
+	}
+}
\ No newline at end of file
diff --git a/practices/cpp/level1/p11_Fighters/Controller.h b/practices/cpp/level1/p11_Fighters/Controller.h
new file mode 100644
index 00000000..4a20731b
--- /dev/null
+++ b/practices/cpp/level1/p11_Fighters/Controller.h
@@ -0,0 +1,9 @@
+#ifndef CONTROLLER_H
+#define CONTROLLER_H
+#include "Sky.h"
+#define SPEED 5
+class Controller{
+public:
+	void control(Plane &plane);
+};
+#endif
\ No newline at end of file
diff --git a/practices/cpp/level1/p11_Fighters/Firer.cpp b/practices/cpp/level1/p11_Fighters/Firer.cpp
new file mode 100644
index 00000000..2dab55e1
--- /dev/null
+++ b/practices/cpp/level1/p11_Fighters/Firer.cpp
@@ -0,0 +1,13 @@
+#include "Sky.h"
+
+Firer::Firer(Sky &sky , LoadTexture &loadtexture){
+	this->sky = &sky;
+	this->loadtexture = &loadtexture;
+}
+void Firer::fire(sf::Vector2f position , int type){
+	bullet = new Bullet(type);
+	bullet->setTexture(*loadtexture->getTextureByName("bullet2"));
+	bullet->setOrigin(bullet->getTexture()->getSize().x / 2 ,bullet->getTexture()->getSize().y / 2);
+	bullet->setPosition(position);
+	sky->add(bullet);
+}
\ No newline at end of file
diff --git a/practices/cpp/level1/p11_Fighters/Firer.h b/practices/cpp/level1/p11_Fighters/Firer.h
new file mode 100644
index 00000000..f74df0fd
--- /dev/null
+++ b/practices/cpp/level1/p11_Fighters/Firer.h
@@ -0,0 +1,9 @@
+#ifndef FIRER_H
+#define FIRER_H
+#include <SFML/Graphics.hpp>
+#include <SFML/Audio.hpp>
+#include "LoadTexture.h"
+// xun huan yinyong priblem
+// move the content to sky.h
+
+#endif
\ No newline at end of file
diff --git a/practices/cpp/level1/p11_Fighters/LoadTexture.cpp b/practices/cpp/level1/p11_Fighters/LoadTexture.cpp
new file mode 100644
index 00000000..8f9a32d9
--- /dev/null
+++ b/practices/cpp/level1/p11_Fighters/LoadTexture.cpp
@@ -0,0 +1,22 @@
+#include "LoadTexture.h"
+
+void LoadTexture::loadFromFile(string path){
+	initLoad();
+	sf::Image image;
+	sf::Texture *texture;
+	image.loadFromFile(path);
+	for (int i = 0 ; i < imageVector.size() ; i ++){
+		sf::IntRect r(imageVector.at(i)->position[0] , imageVector.at(i)->position[1] , imageVector.at(i)->position[2] , imageVector.at(i)->position[3]);
+		texture = new sf::Texture();
+		texture->loadFromImage(image , r);
+		textureVector.push_back(texture);
+	}
+}
+sf::Texture* LoadTexture::getTextureByName(string name){
+	for (int i = 0 ; i < imageVector.size() ; i++){
+		if (imageVector.at(i)->name == name){
+			return textureVector.at(i);
+		}
+	}
+	std::cout<<"no texture matched!\n";
+}
\ No newline at end of file
diff --git a/practices/cpp/level1/p11_Fighters/LoadTexture.h b/practices/cpp/level1/p11_Fighters/LoadTexture.h
new file mode 100644
index 00000000..b6dfcbe0
--- /dev/null
+++ b/practices/cpp/level1/p11_Fighters/LoadTexture.h
@@ -0,0 +1,321 @@
+#ifndef LOADTEXTURE_H
+#define LOADTEXTURE_H
+#include <string>
+#include <SFML/Graphics.hpp>
+#include <SFML/Audio.hpp>
+#include <vector>
+#include <iostream>
+using namespace std;
+struct Position{
+	string name;
+	int position[4];
+};
+typedef struct Position ImagePosition;
+
+class LoadTexture{
+	public:
+		void loadFromFile(string path);
+		sf::Texture* getTextureByName(string name);
+		void initLoad(){
+imagePosition = new ImagePosition;
+imagePosition -> name = "enemy3_down6";
+imagePosition -> position[0] = 0;
+imagePosition -> position[1] = 747;
+imagePosition -> position[2] = 166;
+imagePosition -> position[3] = 261;
+imageVector.push_back(imagePosition);
+imagePosition = new ImagePosition;
+imagePosition -> name = "enemy3_hit";
+imagePosition -> position[0] = 166;
+imagePosition -> position[1] = 750;
+imagePosition -> position[2] = 169;
+imagePosition -> position[3] = 258;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "enemy3_n1";
+imagePosition -> position[0] = 335;
+imagePosition -> position[1] = 750;
+imagePosition -> position[2] = 169;
+imagePosition -> position[3] = 258;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "enemy3_n2";
+imagePosition -> position[0] = 504;
+imagePosition -> position[1] = 750;
+imagePosition -> position[2] = 169;
+imagePosition -> position[3] = 258;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "enemy3_down1";
+imagePosition -> position[0] = 0;
+imagePosition -> position[1] = 486;
+imagePosition -> position[2] = 165;
+imagePosition -> position[3] = 261;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "enemy3_down2";
+imagePosition -> position[0] = 0;
+imagePosition -> position[1] = 225;
+imagePosition -> position[2] = 165;
+imagePosition -> position[3] = 261;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "enemy3_down5";
+imagePosition -> position[0] = 673;
+imagePosition -> position[1] = 748;
+imagePosition -> position[2] = 166;
+imagePosition -> position[3] = 260;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "enemy3_down3";
+imagePosition -> position[0] = 839;
+imagePosition -> position[1] = 748;
+imagePosition -> position[2] = 165;
+imagePosition -> position[3] = 260;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "enemy3_down4";
+imagePosition -> position[0] = 165;
+imagePosition -> position[1] = 486;
+imagePosition -> position[2] = 165;
+imagePosition -> position[3] = 261;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "hero1";
+imagePosition -> position[0] = 0;
+imagePosition -> position[1] = 99;
+imagePosition -> position[2] = 102;
+imagePosition -> position[3] = 126;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "hero2";
+imagePosition -> position[0] = 165;
+imagePosition -> position[1] = 360;
+imagePosition -> position[2] = 102;
+imagePosition -> position[3] = 126;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "hero_blowup_n1";
+imagePosition -> position[0] = 165;
+imagePosition -> position[1] = 234;
+imagePosition -> position[2] = 102;
+imagePosition -> position[3] = 126;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "hero_blowup_n2";
+imagePosition -> position[0] = 330;
+imagePosition -> position[1] = 624;
+imagePosition -> position[2] = 102;
+imagePosition -> position[3] = 126;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "hero_blowup_n3";
+imagePosition -> position[0] = 330;
+imagePosition -> position[1] = 498;
+imagePosition -> position[2] = 102;
+imagePosition -> position[3] = 126;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "hero_blowup_n4";
+imagePosition -> position[0] = 432;
+imagePosition -> position[1] = 624;
+imagePosition -> position[2] = 102;
+imagePosition -> position[3] = 126;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "enemy2";
+imagePosition -> position[0] = 0;
+imagePosition -> position[1] = 0;
+imagePosition -> position[2] = 69;
+imagePosition -> position[3] = 99;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "enemy2_hit";
+imagePosition -> position[0] = 432;
+imagePosition -> position[1] = 525;
+imagePosition -> position[2] = 69;
+imagePosition -> position[3] = 99;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "ufo2";
+imagePosition -> position[0] = 102;
+imagePosition -> position[1] = 118;
+imagePosition -> position[2] = 60;
+imagePosition -> position[3] = 107;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "enemy2_down1";
+imagePosition -> position[0] = 534;
+imagePosition -> position[1] = 655;
+imagePosition -> position[2] = 69;
+imagePosition -> position[3] = 95;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "enemy2_down2";
+imagePosition -> position[0] = 603;
+imagePosition -> position[1] = 655;
+imagePosition -> position[2] = 69;
+imagePosition -> position[3] = 95;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "enemy2_down3";
+imagePosition -> position[0] = 672;
+imagePosition -> position[1] = 653;
+imagePosition -> position[2] = 69;
+imagePosition -> position[3] = 95;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "enemy2_down4";
+imagePosition -> position[0] = 741;
+imagePosition -> position[1] = 653;
+imagePosition -> position[2] = 69;
+imagePosition -> position[3] = 95;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "ufo1";
+imagePosition -> position[0] = 267;
+imagePosition -> position[1] = 398;
+imagePosition -> position[2] = 58;
+imagePosition -> position[3] = 88;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "bomb";
+imagePosition -> position[0] = 810;
+imagePosition -> position[1] = 691;
+imagePosition -> position[2] = 63;
+imagePosition -> position[3] = 57;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "enemy1_down1";
+imagePosition -> position[0] = 267;
+imagePosition -> position[1] = 347;
+imagePosition -> position[2] = 57;
+imagePosition -> position[3] = 51;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "enemy1_down2";
+imagePosition -> position[0] = 873;
+imagePosition -> position[1] = 697;
+imagePosition -> position[2] = 57;
+imagePosition -> position[3] = 51;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "enemy1_down3";
+imagePosition -> position[0] = 267;
+imagePosition -> position[1] = 296;
+imagePosition -> position[2] = 57;
+imagePosition -> position[3] = 51;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "enemy1_down4";
+imagePosition -> position[0] = 930;
+imagePosition -> position[1] = 697;
+imagePosition -> position[2] = 57;
+imagePosition -> position[3] = 51;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "game_pause_nor";
+imagePosition -> position[0] = 267;
+imagePosition -> position[1] = 251;
+imagePosition -> position[2] = 60;
+imagePosition -> position[3] = 45;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "game_pause_pressed";
+imagePosition -> position[0] = 810;
+imagePosition -> position[1] = 646;
+imagePosition -> position[2] = 60;
+imagePosition -> position[3] = 45;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "enemy1";
+imagePosition -> position[0] = 534;
+imagePosition -> position[1] = 612;
+imagePosition -> position[2] = 57;
+imagePosition -> position[3] = 43;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "bullet1";
+imagePosition -> position[0] = 1004;
+imagePosition -> position[1] = 987;
+imagePosition -> position[2] = 9;
+imagePosition -> position[3] = 21;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+imagePosition = new ImagePosition;
+imagePosition -> name = "bullet2";
+imagePosition -> position[0] = 69;
+imagePosition -> position[1] = 78;
+imagePosition -> position[2] = 9;
+imagePosition -> position[3] = 21;
+if (imagePosition != NULL){
+	imageVector.push_back(imagePosition);
+}
+}
+	private:
+		vector<sf::Texture *> textureVector;
+		vector<ImagePosition*> imageVector;
+		ImagePosition* imagePosition;
+};
+#endif
\ No newline at end of file
diff --git a/practices/cpp/level1/p11_Fighters/Plane.cpp b/practices/cpp/level1/p11_Fighters/Plane.cpp
new file mode 100644
index 00000000..3b1796d2
--- /dev/null
+++ b/practices/cpp/level1/p11_Fighters/Plane.cpp
@@ -0,0 +1,67 @@
+#include "Sky.h"
+#include "math.h"
+Plane::Plane(int type){
+	ifStop = false;
+	ifKilled = false;
+	this->type = type;
+	planeClock.restart();
+	bulletSoundBuffer.loadFromFile("resource/sounds/bullet.ogg");
+	bulletSound.setBuffer(bulletSoundBuffer);
+	nowTexture = 0;
+	downSoundbuffer.loadFromFile("resource/sounds/enemy1_down.ogg");
+	downSound.setBuffer(downSoundbuffer);
+}
+void Plane::fire(){
+	if((planeClock.getElapsedTime().asSeconds() > sf::seconds(0.2f).asSeconds()) || (this->type != HERO)){
+		planeFirer->fire(this->getPosition() , this->getType());
+		planeClock.restart();
+		bulletSound.play();
+	}
+}
+int Plane::getType(){
+	return type;
+}
+void Plane::setFirer(Firer &firer){
+	this->planeFirer = &firer;
+}
+void Plane::kill(Sky *sky){
+	ifKilled = true;
+	textureClock.restart();
+	this->setTexture(*textureVector->at(0));
+	downSound.play();
+}
+bool Plane::ifCouldErase(){
+	if(ifStop && ifKilled){
+		return true;
+	}else{
+		return false;
+	}
+}
+bool Plane::ifkill(){
+	return ifKilled;
+}
+void Plane::moveThis(){
+	if (this->type == ENEMY_1){
+		if (this->ifKilled){
+			if (textureClock.getElapsedTime().asSeconds() > sf::seconds(timePerTexture).asSeconds()){
+				nowTexture ++;
+				textureClock.restart();
+				if (nowTexture > 3){
+					ifStop = true;
+					return;
+				}
+				this->setTexture(*textureVector->at(nowTexture));
+				return;
+			}
+			return;
+		}
+		this->move(0 , 3);
+	}
+}
+void Plane::setTextureVector(std::vector<sf::Texture*> *v){
+	this->textureVector = v;
+}
+void Plane::setTimePerTexture(float time){
+	timePerTexture = time;
+}
+
diff --git a/practices/cpp/level1/p11_Fighters/Plane.h b/practices/cpp/level1/p11_Fighters/Plane.h
new file mode 100644
index 00000000..0b9f16aa
--- /dev/null
+++ b/practices/cpp/level1/p11_Fighters/Plane.h
@@ -0,0 +1,6 @@
+#ifndef PLANE_H
+#define PLANE_H
+#include <SFML/Graphics.hpp>
+#include <SFML/Audio.hpp>
+// move the content to sky.h
+#endif
\ No newline at end of file
diff --git a/practices/cpp/level1/p11_Fighters/Sky.cpp b/practices/cpp/level1/p11_Fighters/Sky.cpp
new file mode 100644
index 00000000..5cb86b65
--- /dev/null
+++ b/practices/cpp/level1/p11_Fighters/Sky.cpp
@@ -0,0 +1,165 @@
+#include "Sky.h"
+Sky::Sky(){
+	score = 0;
+	level = 1;
+	ss_Score.str("");
+	ss_Score << score;
+	string_Score = ss_Score.str();
+	text_Score.setString("Score : " + string_Score);
+	font.loadFromFile("resource/fonts/myTTF.ttf");
+	text_Score.setFont(font);
+	text_Score.setPosition(5, 5);
+	text_Score.setColor(sf::Color::Black);
+	text_Score.setCharacterSize(24);
+
+	text_Level.setFont(font);
+	text_Level.setPosition((480 / 2) - 34 * 2 , 800 / 2);
+	text_Level.setColor(sf::Color::Black);
+	text_Level.setCharacterSize(34);
+	levelClock.restart();
+	backgroundClock.restart();
+	ifStart = false;
+}
+void Sky::add(sf::Sprite &sprite){
+	if(((Plane*)(&sprite))->getType() == HERO){
+		//std::cout << "add Plane\n";
+		spriteVector.push_back(&sprite);
+		return;
+	}
+	if(((Plane*)(&sprite))->getType() == ENEMY_1){
+		//std::cout << "add enemy\n";
+		enemy_1Vector.push_back(&sprite);
+		return;
+	}
+	animationVector.push_back(&sprite);
+	//std::cout << "add other\n";
+}
+void Sky::add(Bullet *bullet){
+	if (bullet->getType() == HERO_BULLET){
+		std::cout << "add hero bullet\n";
+		herobulletVector.push_back(bullet);
+		return;
+	}
+	if (bullet->getType() == ENEMY_BULLET){
+		std::cout << "add enemy bullet\n";
+		enemybulletVector.push_back(bullet);
+		return;
+	}
+}
+
+void Sky::draw(sf::RenderWindow &window){
+	// move all
+	this->moveAll();
+	// check
+	check();
+	// draw the hero
+	for (int i = 0 ; i != spriteVector.size() ; i ++){
+		window.draw(*spriteVector.at(i));
+	}
+	// draw the hero bullet
+	for (int i = 0 ; i != herobulletVector.size() ; i ++){
+		window.draw(*herobulletVector.at(i));
+	}
+	// draw the enemy
+	for (int i = 0 ; i != enemy_1Vector.size() ; i ++){
+		window.draw(*enemy_1Vector.at(i));
+	}
+	// draw enemy bullet
+	for (int i = 0 ; i != enemybulletVector.size() ; i ++){
+		window.draw(*enemybulletVector.at(i));
+	}
+	// draw the score
+	window.draw(text_Score);
+	// draw the level
+	if (levelClock.getElapsedTime().asSeconds() < sf::seconds(1.5f).asSeconds()){
+		window.draw(text_Level);
+	}
+
+
+}
+void Sky::moveAll(){
+	// move hero bullets
+	int i = 0;
+	while (i < herobulletVector.size()){
+		if(herobulletVector.at(i)->getPosition().y + herobulletVector.at(i)->getTexture()->getSize().y / 2 < 0){
+			// erase the bullet
+			delete herobulletVector.at(i);
+			herobulletVector.erase(herobulletVector.begin() + i);
+			continue;
+		}
+		herobulletVector.at(i)->move(0, -5);
+		i ++;
+	}
+	// move enemybullet
+	i = 0;
+	while (i < enemybulletVector.size()){
+		if(enemybulletVector.at(i)->getPosition().y - enemybulletVector.at(i)->getTexture()->getSize().y / 2 > 800){
+			// erase the bullet
+			delete enemybulletVector.at(i);
+			enemybulletVector.erase(enemybulletVector.begin() + i);
+			continue;
+		}
+		enemybulletVector.at(i)->move(0 , 5);
+		i++;
+	}
+	// move enemy
+	i = 0;
+	while(i < enemy_1Vector.size()){
+		if((enemy_1Vector.at(i)->getPosition().y - enemy_1Vector.at(i)->getTexture()->getSize().y / 2 > 800)||(((Plane*)enemy_1Vector.at(i))->ifCouldErase())){
+			// erase the enemy
+			delete enemy_1Vector.at(i);
+			enemy_1Vector.erase(enemy_1Vector.begin()+i);
+			continue;
+		}
+		((Plane*)enemy_1Vector.at(i))->moveThis();
+		i ++;
+	}
+}
+void Sky::check(){
+	int i = 0;
+	bool tmp = false;
+	while(i < herobulletVector.size()){
+		for(int j = 0 ; j < enemy_1Vector.size() ; j ++){
+			if (herobulletVector.at(i)->getGlobalBounds().intersects(enemy_1Vector.at(j)->getGlobalBounds()) && !((Plane*)enemy_1Vector.at(j))->ifkill()){
+				// kill the enemy
+				((Plane*)enemy_1Vector.at(j))->kill(this);
+				delete herobulletVector.at(i);
+				herobulletVector.erase(herobulletVector.begin() + i);
+				tmp = true;
+				score += 10;
+				ss_Score.str("");
+				ss_Score << score;
+				string_Score = ss_Score.str();
+				text_Score.setString("Score : " + string_Score);
+				if(level != (score / 100) + 1){
+					// change the level
+					level = score / 100 + 1;
+					ss_Level.str("");
+				ss_Level << level;
+				string_Level = ss_Level.str();
+				text_Level.setString("Level " + string_Level);
+				levelClock.restart();
+				}
+				break;
+			}
+		}
+		if (tmp){
+			tmp = false;
+			continue;
+		}
+		i++;
+	}
+}
+int Sky::getLevel(){
+	return level;
+}
+void Sky::guiChu(){
+	if (ifStart){
+		if (backgroundStartClock.getElapsedTime().asSeconds() > sf::seconds(0.5f).asSeconds()){
+			ifStart = false;
+			backgroundClock.restart();
+			return;
+		}
+
+	}
+}
diff --git a/practices/cpp/level1/p11_Fighters/Sky.h b/practices/cpp/level1/p11_Fighters/Sky.h
new file mode 100644
index 00000000..35e270ff
--- /dev/null
+++ b/practices/cpp/level1/p11_Fighters/Sky.h
@@ -0,0 +1,84 @@
+#ifndef SKY_H
+#define SKY_H
+#include <SFML/Graphics.hpp>
+#include <SFML/Audio.hpp>
+#include "Bullet.h"
+#include <vector>
+#include "Plane.h"
+#include "LoadTexture.h"
+#include <iostream>
+#include <sstream>
+// Sky Class
+class Sky{
+public:
+	Sky();
+	void add(sf::Sprite &sprite);
+	void add(Bullet *bullet);
+	void draw(sf::RenderWindow &window);
+	int getLevel();
+private:
+	void moveAll();
+	void check();
+	std::vector<sf::Sprite *> spriteVector;
+	std::vector<Bullet*> herobulletVector;
+	std::vector<Bullet*> enemybulletVector;
+	std::vector<sf::Sprite *> enemy_1Vector;
+	std::vector<sf::Sprite *> animationVector;
+	sf::Sprite* enemyNum[100];
+	int score;
+	int level;
+	sf::Text text_Score;
+	std::string string_Score;
+	std::stringstream ss_Score;
+	sf::Font font;
+	sf::Clock levelClock;
+	sf::Text text_Level;
+	std::string string_Level;
+	std::stringstream ss_Level;
+	sf::Clock backgroundClock;
+	sf::Clock backgroundStartClock;
+	void guiChu();
+	bool ifStart;
+};
+// Firer class
+class Firer{
+public:
+	Firer(Firer &firer);
+	Firer(Sky &sky , LoadTexture &loadtexture);
+	void fire(sf::Vector2f positon , int type);
+private:
+	Bullet *bullet;
+	Sky *sky;
+	LoadTexture *loadtexture;
+};
+// Plane class
+#define HERO 1
+#define ENEMY_1 2
+class Plane:public sf::Sprite{
+public:
+	Plane(int type);
+	void setFirer(Firer &firer);
+	void fire();
+	int getType();
+	void kill(Sky *sky);
+	bool ifCouldErase();
+	bool ifkill();
+	void moveThis();
+	void setTextureVector(std::vector<sf::Texture*> *v);
+	void setTimePerTexture(float time);
+private:
+	sf::Clock planeClock;
+	int type;
+	Firer *planeFirer;
+	sf::Sound bulletSound;
+	sf::SoundBuffer bulletSoundBuffer;
+	bool ifStop;
+	bool ifKilled;
+	int nowTexture;
+	std::vector<sf::Texture*> *textureVector;
+	sf::Clock textureClock;
+	float timePerTexture;
+	sf::SoundBuffer downSoundbuffer;
+	sf::Sound downSound;
+};
+#endif
\ No newline at end of file
diff --git a/practices/cpp/level1/p11_Fighters/main.cpp b/practices/cpp/level1/p11_Fighters/main.cpp
new file mode 100644
index 00000000..2688587c
--- /dev/null
+++ b/practices/cpp/level1/p11_Fighters/main.cpp
@@ -0,0 +1,84 @@
+#include <SFML/Graphics.hpp>
+#include <SFML/Audio.hpp>
+#include "Sky.h"
+#include "LoadTexture.h"
+#include "Plane.h"
+#include "Controller.h"
+#include "Bullet.h"
+#include "Firer.h"
+int main(void){
+	// the score
+	// the clock to control the enemy
+	sf::Clock enemyClock;
+	enemyClock.restart();
+	// the window
+	sf::RenderWindow window(sf::VideoMode(480 , 800) , "fighters");
+	window.setFramerateLimit(60);
+	// background music
+	sf::Music backgroundMusic;
+	backgroundMusic.openFromFile("resource/sounds/background.ogg");
+	backgroundMusic.setLoop(true);
+	//backgroundMusic.setVolume(20);
+	backgroundMusic.play();
+	// background
+	sf::Sprite backgroundSprite;
+	sf::Texture backgroundTexture;
+	backgroundTexture.loadFromFile("resource/background.png");
+	backgroundSprite.setTexture(backgroundTexture);
+	// sky
+	Sky sky;
+	sky.add(backgroundSprite);
+	// loadtexture
+	LoadTexture loadtexture;
+	loadtexture.initLoad();
+	loadtexture.loadFromFile("resource/shoot.png");
+	// firer
+	Firer firer(sky , loadtexture);
+	// hero
+	Plane hero(HERO);
+	hero.setTexture(*loadtexture.getTextureByName("hero2"));
+	// set hero position
+	hero.setOrigin(hero.getTexture()->getSize().x / 2 , hero.getTexture()->getSize().y / 2);
+	hero.setPosition(window.getSize().x / 2, window.getSize().y - hero.getTexture()->getSize().y / 2);
+	hero.setFirer(firer);
+	sky.add(hero);
+	// the controller
+	Controller controller;
+	// the enemy_1 pointer
+	Plane *enemy;
+	// the enemy_1 vector
+	std::vector<sf::Texture*> enemy_1TextureVector;
+	enemy_1TextureVector.push_back(loadtexture.getTextureByName("enemy1_down1"));
+	enemy_1TextureVector.push_back(loadtexture.getTextureByName("enemy1_down2"));
+	enemy_1TextureVector.push_back(loadtexture.getTextureByName("enemy1_down3"));
+	enemy_1TextureVector.push_back(loadtexture.getTextureByName("enemy1_down4"));
+	// the loop
+	while (window.isOpen()){
+		sf::Event event;
+		while (window.pollEvent(event)){
+			if (event.type == sf::Event::Closed){
+				window.close();
+			}
+		}
+		// random add enemy
+		if((enemyClock.getElapsedTime().asSeconds() > sf::seconds(1.0f).asSeconds()))
+		{
+			enemy = new Plane(ENEMY_1);
+			enemy->setTexture(*loadtexture.getTextureByName("enemy1"));
+			enemy->setOrigin(enemy->getTexture()->getSize().x / 2, enemy->getTexture()->getSize().y / 2);
+			enemy->setFirer(firer);
+			enemy->setTimePerTexture(0.05f);
+			int a = 480- int(hero.getTexture()->getSize().x / 2), b = int(hero.getTexture()->getSize().x / 2);
+			enemy->setPosition((rand()%(b-a+1)+b), 0);
+			enemy->setTextureVector(&enemy_1TextureVector);
+			sky.add(*enemy);
+			enemy->fire();
+			enemyClock.restart();
+		}
+		window.clear();
+		window.draw(backgroundSprite);
+		controller.control(hero);
+		sky.draw(window);
+		window.display();
+	}
+}
diff --git a/prime.c b/prime.c
new file mode 100644
index 00000000..745357e3
--- /dev/null
+++ b/prime.c
@@ -0,0 +1,31 @@
+#include <stdio.h>
+int pd(int n)
+{
+	if(n==1||n==2)
+	{
+		return 1;
+	}
+	for(int i=2;i<=n/2;i++)
+	{
+		if(n%i==0)
+		{
+			return 0;
+		}
+	}
+	return 0;
+ } 
+ int main()
+ {
+ 	printf("Please Input a Number");
+ 	int n;
+ 	scanf("%s",&n);
+ 	if(pd(n)==0)
+ 	{
+ 		print("Not Prime");
+	 }
+	 else
+	 {
+	 	print("Prime");
+	 }
+	 return 0;
+ }