Problem 5

#include<stdio.h>
int main()
{
    float physics,chemistry,biology,mathematics,computer,percent;
    printf("Physics=");
    scanf("%f", &physics);
    printf("Biology=");
    scanf("%f", &biology);
    printf("Chemistry=");
    scanf("%f", &chemistry);
    printf("Mathematics=");
    scanf("%f", &mathematics);
    printf("Computer=");
    scanf("%f", &computer);
    percent=(physics+chemistry+biology+mathematics+computer)/5;
    printf("percentage= %f", percent);
    if(percent>=90)
        printf("Grade A\n");
    else if(percent>=80)
        printf("Grade B\n");
    else if(percent>=70)
        printf("Grade C\n");
    else if(percent>=60)
        printf("Grade D\n");
    else if(percent>=40)
        printf("Grade E\n");
    else if(percent<40)
        printf("Grade F\n");
    return 0;
}