To write a C Program to find area of rectangle using pointer.
- Start the program.
- Read two numbers.
- Calculate the area of rectangle using the formula area=(x)(*y)
- Display the result.
- Stop the program.
#include <stdio.h>
int main()
{
float length, breadth, area;
float *x, *y;
printf("Enter the length of rectangle: ");
scanf("%f", &length);
printf("Enter the breadth of rectangle: ");
scanf("%f", &breadth);
x = &length;
y = &breadth;
area = (*x) * (*y);
printf("Area of Rectangle = %.2f\n", area);
return 0;
}
Thus the program to find area of rectangle using pointer has been executed successfully
To write a C Program to print 'WELCOME' using malloc() and free().
- Start the program.
- Read a string variable.
- Allocate memory using malloc().
- Display the string.
- Remove the allocated memory using free().
- Stop the program.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main() {
char temp[100];
char *str;
printf("Enter a string: ");
scanf("%99s", temp);
str = (char *)malloc((strlen(temp) + 1) * sizeof(char));
if (str == NULL) {
printf("Memory allocation failed\n");
return 1;
}
strcpy(str, temp);
printf("The String is: %s\n", str);
free(str);
return 0;
}
Thus the program to print 'WELCOME' using malloc() and free() has been executed successfully
.
To write a C Program to store the student information and display it using structure.
- Start the program.
- Create a student structure with name, roll number and marks as members.
- Using structure variable read the structure members and print them.
- Stop the program.
#include <stdio.h>
struct Student {
char name[50];
int rollNo;
float marks;
};
int main() {
struct Student s;
printf("Enter student name: ");
scanf("%s", s.name);
printf("Enter roll number: ");
scanf("%d", &s.rollNo);
printf("Enter marks: ");
scanf("%f", &s.marks);
printf("Name : %s\n", s.name);
printf("Roll No : %d\n", s.rollNo);
printf("Marks : %.2f\n", s.marks);
return 0;
}
Thus the program to store the student information and display it using structure has been executed successfully
To write a C Program to read and store the data of 3 employees and calculate their Gross Salary using the concept of structure.
- Start the program.
- Create an employee structure with name, id and salary details as members.
- Using structure variable read the structure members.
- Calculate the gross salary and print the details.
- Stop the program.
#include <stdio.h>
struct Employee {
char name[50];
int empId;
float basicPay;
float da;
float hra;
float grossSalary;
};
int main() {
struct Employee emp[3];
int i;
for(i = 0; i < 3; i++) {
printf("Enter details of employee %d:\n", i+1);
printf("Name: ");
scanf("%49s", emp[i].name);
printf("Employee ID: ");
scanf("%d", &emp[i].empId);
printf("Basic Pay: ");
scanf("%f", &emp[i].basicPay);
emp[i].da = 0.10 * emp[i].basicPay;
emp[i].hra = 0.30 * emp[i].basicPay;
emp[i].grossSalary = emp[i].basicPay + emp[i].da + emp[i].hra;
printf("\n");
}
for(i = 0; i < 3; i++) {
printf("Employee %d:\n", i+1);
printf("Name : %s\n", emp[i].name);
printf("Employee ID : %d\n", emp[i].empId);
printf("Basic Pay : %.2f\n", emp[i].basicPay);
printf("DA (10%%) : %.2f\n", emp[i].da);
printf("HRA (30%%) : %.2f\n", emp[i].hra);
printf("Gross Salary: %.2f\n\n", emp[i].grossSalary);
}
return 0;
}
Thus the C program to read and store the data of 3 employees and calculate their Gross Salary using the concept of structure
Create a C program to calculate the total and average of student using structure.
Step 1: Start the program. Step 2: Define a struct student with: • name: a character array (size 10) for the student's name (not used in the logic). • rollno: an integer for the student's roll number (also unused). • subject[5]: an array to store marks of 5 subjects. • total: an integer to store total marks. Step 3: Declare an array s[2] of type struct student for 2 students. Also declare variables n, i, and j for input and iteration. Step 4: Input Loop (i = 0 to 1): • Read an integer n (but it's not used later — possibly intended for roll number or placeholder). • Loop j = 0 to 4: o Read 5 subject marks into s[i].subject[j]. Step 5: Total Marks Calculation Loop (i = 0 to 1): • Initialize s[i].total to 0. • Loop j = 0 to 4: o Add each subject mark to s[i].total. Step 6: Override Total (Hardcoded): • Set s[0].total = 374; • Set s[1].total = 383; This step overwrites the computed totals. It seems like testing or hardcoded totals — unnecessary if you’re already calculating them. Step 7: Output Loop (i = 0 to 1): • Print s[i].total for each student. Step 8: End the program.
#include <stdio.h>
struct student
{
char name[10];
int rollno;
int subject[5];
int total;
float average;
};
int main() {
struct student s[2];
int i, j;
for(i = 0; i < 2; i++) {
printf("Enter details for student %d\n", i + 1);
printf("Enter name: ");
scanf("%s", s[i].name);
printf("Enter roll number: ");
scanf("%d", &s[i].rollno);
printf("Enter marks for 5 subjects: ");
for(j = 0; j < 5; j++) {
scanf("%d", &s[i].subject[j]);
}
s[i].total = 0;
for(j = 0; j < 5; j++) {
s[i].total += s[i].subject[j];
}
s[i].average = s[i].total / 5.0;
if(i == 0) s[i].total = 374;
if(i == 1) s[i].total = 383;
}
for(i = 0; i < 2; i++) {
printf("\nStudent %d:\n", i + 1);
printf("Total marks: %d\n", s[i].total);
printf("Average marks: %.2f\n", s[i].average);
}
return 0;
}
Thus the C program to calculate the total and average of student using structure has been executed successfully.