#include<iostream>
#include<string> 

using namespace std;

//交換函式
//1、值傳遞 (形參不會修飾實參)
void mySwap01(int a, int b)
{
	int tmp = a;
	a = b;
	b = tmp;

	cout << "mySwap01 a = " << a << endl;
	cout << "mySwap01 b = " << b << endl;
}

//2、地址傳遞 （形參會修飾實參）
void mySwap02(int* p, int* q)
{
	int tmp = *p;
	*p = *q;
	*q = tmp;

	cout << "mySwap02 p = " << *p << endl;
	cout << "mySwap02 q = " << *q << endl;
}


//3、引用傳遞 （形參會修飾實參）
void mySwap03(int &m, int &n)
{
	int tmp = m;
	m = n;
	n = tmp;

	cout << "mySwap03 m = " << m << endl;
	cout << "mySwap03 n = " << n << endl;
}

int main()
{
	int a = 10;
	int b = 20;

	mySwap01(a, b);  //值傳遞，形參不會修飾實參

	cout << "a = " << a << endl;
	cout << "b = " << b << endl;

	int p = 30;
	int q = 40;

	mySwap02(&p, &q);  //地址傳遞，形參會修飾實參

	cout << "p = " << p << endl;
	cout << "q = " << q << endl;

	int m = 50;
	int n = 60;

	mySwap03(m, n);  //引用傳遞，形參會修飾實參

	cout << "m = " << m << endl;
	cout << "n = " << n << endl;

	system("pause");

	return 0;
}