统计学生的成绩、总分、平均分以及不及格的人数

#include<bits/stdc++.h>
int main()
{
    int c,i,n;
    double grade,total;
    printf("Enter n:");
    scanf("%d",&n);
    total = 0;
    c = 0;

    for(i=1;i<=n;i++)
    {
        printf("Enter grade %d: ",i);
        scanf("%lf",&grade);
        total = total + grade;
        if(grade<60){
                c++;
           }
    }
    printf("Grade average = %.2f\n",total/n);
    printf("Number of failures = %d\n",c);
    return 0;
}