关于#c语言#的问题，请各位专家解答！

#include <stdio.h>
int add(int a,int b);  
int main()
{
    int i,j,n,sum = 0;
    int a[40][4];
    int b[40];
    scanf("%d",&n);
    for(i = 0;i < n;i++){
        int count = 0;
        for(j = 0;j < 4;j++){
            scanf("%d", &a[i][j]);
            sum += a[i][j];
            if(a[i][j] > 85) count ++;
            if(count >= 2){
                b[i] = 1;
            }
        }
    }
    printf("%.1f\n", sum / 4.0 / n);
    for(i = 0;i < n;i++){
        if(b[i] == 1){
            for(j = 0;j < 4;j++){
                printf("%d ", a[i][j]);
            }
            printf("\n");
        }
    }
    return 0;
}