关于杭电oj2023 求平均成绩，一直不知道哪里错了，求解答

[Roxannekkk]

题目链接http://acm.hdu.edu.cn/showproblem.php?pid=2023
以下是代码：

#include<stdio.h>

int main()
{
	int n, m;
	while (scanf("%d%d", &n, &m) != EOF)
	{
		double a[55][9];
		double couavg[9];double stuavg[55];

		for (int i = 0;i < n;i++)
		{
			for (int j = 0;j < m;j++)
			{
				scanf("%lf", &a[i][j]);//输入成绩
			}
		}

		for (int i = 0;i < n;i++)
		{
			double savg = 0;

			for (int j = 0;i < m;j++)
			{
				savg = savg + a[i][j];
			}
			printf("%.2lf", savg / m);
			stuavg[i] = savg / m;
			if (i != n - 1) printf(" ");
			else printf("\n");//计算每个人的平均成绩并按格式输出
		}
		for (int j = 0;j < m;j++)
		{
			double cavg = 0;

			for (int i = 0;i < n;i++)
			{
				cavg += a[i][j];
			}
			printf("%.2lf", cavg / n);couavg[j] = cavg / n;
			if (j != m - 1) printf(" ");
			else printf("\n");
		}//计算每门课的平均成绩并输出
		int count = 0;
		for (int i = 0;i < n;i++)
		{
			int flag = 1;
			for (int j = 0;j < m;j++)
			{
				if (a[i][j] < couavg[j]) { flag = 0;break; }
			}
			if (flag == 1) count++;//计算满足要求的学生数
		}
		printf("%d\n", count);
	}

	return 0;
}