Prog65.c

// C-program to input marks of five subjects and calculate percentage and grade according to the question.
#include <stdio.h>

int main()
{
    int physics, chemistry, biology, mathematics, computer; 
    float per; 


    printf("Enter five subjects marks: ");
    scanf("%d%d%d%d%d", &physics, &chemistry, &biology, &mathematics, &computer);

    per = (physics + chemistry + biology + mathematics + computer) / 5.0;

    printf("Percentage = %.2f\n", per);

    if(per >= 90)
    {
        printf("Grade A");
    }
    else if(per >= 80)
    {
        printf("Grade B");
    }
    else if(per >= 70)
    {
        printf("Grade C");
    }
    else if(per >= 60)
    {
        printf("Grade D");
    }
    else if(per >= 40)
    {
        printf("Grade E");
    }
    else
    {
        printf("Grade F");
    }

    return 0;
}