problem_5

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