最简单的返回最大值

#include<iostream>

using namespace std;

//函数重载
//不同的形式参数表，不同的返回值类型
int max_fun(int a, int b)
{
	if (a > b)return a;
	else return b;
}

double max_fun(double  a, double  b)
{
	if (a > b)return a;
	else return b;
}

int main()
{
	int a, b;
	double c, d;
	cout << max_fun(1, 5) << endl;

	cout << max_fun(1.3, 3.6) << endl;

	return 0;
}

一维，二维数组的加法&&函数重载

//二维数组传递参数是，行可以省，列不能省
#include<iostream>

using namespace std;

int sum_array(int a[], int n)
{
	int sum = 0;
	for (int i = 0; i < n; i++)
		sum += a[i];
	return sum;
}

int sum_array(int a[][2], int n)
{
	int sum = 0;
	for (int i = 0; i < n; i++)
		for(int j=0;j<2;j++)
		sum += a[i][j];

	return sum;
}
int main()
{
	int a[5] = { 0,1,2,3,4 };
	int b[3][2] = { {0,1},{11,12},{21,22} };

	int sum;
	cout << "一维求和:::::" << endl;
	sum = sum_array(a, 5);
	cout << sum << endl;
	cout << "二维求和::::::::" << endl;
	sum = sum_array(b, 3);
	cout << sum << endl;

	return 0;
}