代码

#include <iostream>
using namespace std;

//实现两个数字进行交换
void swap01(int a, int b)
{
	int temp = a;
	a = b;
	b = temp;
	cout << "swap01a= " << a << endl;
	cout << "swap01b= " << b << endl;
}

void swap02(int * p1, int * p2)
{
	int temp = *p1;
	*p1 = *p2;
	*p2 = temp;
}

int main()
{
	//指针和函数
	//1、值传递
	int a = 10;
	int b = 20;
	swap01(a, b);
	cout << "a= " << a << endl;
	cout << "b= " << b << endl;

	//2、地址传递
	//如果是地址传递，可以修改实参
	swap02(&a, &b);
	cout << "a= " << a << endl;
	cout << "b= " << b << endl;
	system("pause");

	return 0;
}