输入一个数组，输出该数组各行的平均值，并输出最大值

#include "pch.h"
#include <iostream>
double fun1(double ss[][5], int a);
double fun2(double ss[][5]);
double fun3(double ss[][5]);
int main()
{
	int i, n, m;
	double k1, k2, k3, k4, k5;
    std::cout << "Hello World!\n"; 
	double ss[3][5];
	printf("输入3组数，每组5个\n");
	for ( i = 0; i < 3; i++)
	{
		for ( n = 0; n < 5; n++)
		{
			scanf_s("%lf",&ss[i][n]);
			printf("%.0f  ", ss[i][n]);
		}
		printf("\n");
	}
	k1=fun1(ss, 0);
	k2=fun1(ss, 1);
	k3=fun1(ss, 2);
	k4=fun2(ss);
	k5 = fun3(ss);
	printf("第一组数平均值=%.1f\n", k1);
	printf("第二组数平均值=%.1f\n", k2);
	printf("第三组数平均值=%.1f\n", k3);
	printf("三组数的平均值=%.1f\n", k4);
	printf("三组数中最大值=%.1f\n", k5);
	m = 100 / 20;
	printf("%d\n     ",m);
}
double fun1(double ss[][5],int a)
{
	double s = 0, k = 0;
	for (size_t i = 0; i < 5; i++)
	{
		s += ss[a][i];
	}
	k = s / 5;
	return k;

}
double fun2(double ss[][5]) 
{
	double s = 0, k = 0;
	for (size_t is = 0; is< 3; is++)
	{
		for (size_t i = 0; i < 5; i++)
			s += ss[is][i];
	}
	k = s / 15;
	return k;
}
double fun3(double ss[][5])
{
	int i=0, is=0;
	double m = 0;
	for (size_t is = 0; is < 3; is++)
	{
		for (size_t i = 0; i < 5; i++)
		{
			if (m < ss[is][i])
			{
				m = ss[is][i];
			}

		}
	}
	return m;
}
```效果如下
![在这里插入图片描述](https://img-blog.csdnimg.cn/2019050518260865.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDc4OTYyNA==,size_16,color_FFFFFF,t_70)