二级C语言-计负均正-题解（C语言代码）

解题思路:

注意事项:

参考代码:

#include <stdio.h>

int main()

{

        int a[20],i,sum=0,b=0;

        float ave,c=0;

        for(i=0;i<20;i++)

        {

                    scanf("%d",&a[i]);

                     if (a[i]<0)

                            b++;

                    else

                    {

                            sum=sum+a[i];

                            c++;

                    }

        }

        ave=sum/c;

        printf("%d\n",b);

        printf("%.2f\n",ave);

        return 0;

}