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 calculate the average of these marks.

Sample Solution:

C Code:

#include <stdio.h>
int main () {

  float marks, tot_marks = 0;
  int i = 0, subject = 0;
  printf("Input five subject marks(0-100):\n");
  while (subject != 5)
  {
    scanf("%f", &marks);

    if (marks < 0 || marks > 100)
    {

      printf("Not a valid marks\n");

    }
    else
    {
      tot_marks += marks;
      subject++;
    }
  }
  printf("Average marks = %.2f\n", tot_marks/5);
} 

Sample Output:

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

Flowchart:

C programming Code Editor:

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