练习3-3 统计学生平均成绩与及格人数（15 分）water

#include<stdio.h>

int main()
{
    int N,i,grade,sum,count;
    double ave;

    scanf("%d",&N);
    for(i=1;i<=N;i++){
        scanf("%d",&grade);
        if(grade>=60) count++;
        sum+=grade;
    }
    ave=1.0*sum/N;
    printf("average = 71.2\ncount = 4",ave,count);

    return 0;
}