C Exercises: Read five subject marks (0-100) of a student and calculate the average

C Basic Declarations and Expressions: Exercise-118 with Solution

Write a C program that reads five subject marks (0-100) of a student and calculates the average of these marks.

Sample Solution:

C Code:

#include <stdio.h>

int main () {
    float marks, tot_marks = 0;
    int i = 0, subject = 0;

    // Prompt user for input
    printf("Input five subject marks(0-100):\n");

    // Loop to read marks for five subjects
    while (subject != 5) {

        // Read a float value 'marks' from user
        scanf("%f", &marks);

        // Check if 'marks' is within valid range (0-100)
        if (marks < 0 || marks > 100) {
            printf("Not a valid marks\n"); // Print an error message
        }
        else {
            tot_marks += marks; // Accumulate valid marks
            subject++; // Increment subject count
        }
    }

    // Calculate and print the average marks
    printf("Average marks = %.2f\n", tot_marks/5);

    return 0; // End of program
}

Sample Output:

Input five subject marks(0-100):
75
84
56
98
68
Average marks = 76.20

Flowchart:

C programming Code Editor:

Previous: Write a C program that read two integers and dividing the first number by second, print the result of this division with two digits after the decimal point and print "Division not possible..!" if the division is not possible.
Next: Write a C program to calculate the sum all numbers between two given numbers (inclusive) not divisible by 7.