C语言与管道

int main()
{
    int s;
    int n;
    float avg;
    
    scanf("%d,%d",&s,&n);   //特别注意的地方

   // scanf("%d",&n);
 
    avg=s/n;
    printf("avg is %f \n",avg);

    return 0;
}

#include <stdio.h>

int main()
{
    int i;
    int n=0;
    int s=0;
    while(1)
    {
        scanf("%d",&i);
        if(i==0)
        {
           break; 
        }
        n++;
        s+=i;
    }
    printf("%d,%d\n",s,n);
    return 0;
}

./input.out | ./avg.out