求平均成绩

#include <cstdio>

struct Stu
{
    double score[5];
    double sum;
    double avg;
};

int main()
{
    int n, m;
    while(scanf("%d %d", &n, &m) != EOF)
    {
        Stu stu[n];
        double ke[m] = {0}, ke_avg[m] = {0};
        
        for(int i = 0; i < n; ++ i)
        {
            stu[i].sum = 0;
            for(int j = 0; j < m; ++ j)
            {
                scanf("%lf", &stu[i].score[j]);
                stu[i].sum += stu[i].score[j];
            }
            stu[i].avg = stu[i].sum / m;
        }
        
        for(int i = 0; i < n; ++ i)
        {
            if(i)    printf(" %.2f", stu[i].avg);
            else    printf("%.2f", stu[i].avg);
        }
        printf("
");
        
        for(int j = 0; j < m; ++ j)
        {
            for(int i = 0; i < n; ++ i)
            {
                ke[j] += stu[i].score[j];
            }
            ke_avg[j] = ke[j] / n;
        }
        for(int i = 0; i < m; ++ i)
        {
            if(i)    printf(" %.2f", ke_avg[i]);
            else    printf("%.2f", ke_avg[i]);
        }
        printf("
");
        
        int count = 0;
        for(int i = 0; i < n; ++ i)
        {
            bool flag = true;
            for(int j = 0; j < m; ++ j)
            {
                if(stu[i].score[j] < ke_avg[j])
                {
                    flag = false;
                    break;
                }
            }
            if(flag)    count ++;
        }
        printf("%d

", count);
    }
    
    
    return 0;
}

在循环中每个学生的sum初始都要清零(第20行代码)

Wrong Answer(第20行, 结构体中的sum没有初始化)->Accepted