键盘输入一组学生成绩，–1作为输入的结束，输出这批数剧的个数，最大值，最小值，平均值

Question

Answer 1

供参考：

#include<stdio.h>
#include<limits.h>
int main()
{
    int    n,num=0,max=INT_MIN,min=INT_MAX,sum=0;
    double avg=0;
    while(scanf("%d",&n)==1 && n != -1)
    {
         sum += n;
         num++;
         if(n > max)   max = n;
         if(n < min)   min = n;
    }
    if(num==0 && n==-1){
         printf("Input Error!");
    }else{
          avg = 1.0*sum/num;
          printf("num=%d,max=%d,min=%d,avg=%.2f",num,max,min,avg);
    }

    return 0;
}