Create Hexadecimal_To_Decimal.c

Programs/Hexadecimal_To_Decimal.c

@@ -0,0 +1,37 @@
+#include <stdio.h>  
+#include <math.h>  
+#include <string.h>  
+int main()  
+{  
+    char hex[17];                        // declaration of character array.  
+    long long decimal, place;  
+    int i = 0, val, len;                  // variables declaration  
+    decimal = 0;  
+   /* Input hexadecimal number from user */  
+    printf("Enter any hexadecimal number: ");  
+    gets(hex);  
+/* Find the length of total number of hex digit */  
+    len = strlen(hex);  
+    len--;  
+
+    /* 
+     * Iterate over each hex digit 
+     */  
+    while(hex[i]!='\0')  
+    {  
+
+        /* To find the decimal representation of hex[i] */  
+        if(hex[i]>='0' && hex[i]<='9')  
+        {  
+            val = hex[i] - 48;  
+        }  
+        else if(hex[i]>='a' && hex[i]<='f')  
+        {  
+            val = hex[i] - 97 + 10;  
+        }  
+        else if(hex[i]>='A' && hex[i]<='F')  
+        {  
+            val = hex[i] - 65 + 10;  
+        }  
+
+        decimal += val * pow(16, len);