题解 | #记负均正II#

#include <stdio.h>

int main() {
    int a;
    int count1=0;
    int count2=0;
    int sum=0;
    while (scanf("%d", &a) != EOF) {
        if(a<0)
        {
            count1++;
        }
        else {
        count2++;
        sum=sum+a;
        }
    }
    double average=0.0;
    if(count2!=0)
    average=(double)sum/(double)count2;
    printf("%d\n",count1);
    printf("%.1f\n",average);
    return 0;
}