C++引用做函数参数

#include 
using namespace std;

//交换函数

//1、值传递
void mySwap01(int a, int b)
{
	int temp = a;
	a = b;
	b = temp;
	cout <<"mySwap01的a:"<< a << endl;
	cout <<"mySwap01的b:"<< b << endl;
	cout << endl;
}

//2、地址传递
void mySwap02(int* c, int* d)
{
	int temp = *c;;
	*c = *d;
	*d = temp;
	cout << "mySwap02的c:" << *c << endl;
	cout << "mySwap02的d:" << *d << endl;
	cout << endl;
}

//3、引用传递
void mySwap03(int &e,int &f)
{
	int temp = e;
	e = f;
	f = temp;
	cout << e << endl;
	cout << f << endl;
}

int main(void)
{
	int a = 1;
	int b = 2;
	mySwap01(a, b);//值传递，改变了形参，没有改变实参，即形参不会修饰实参
	cout << "a实际值；" << a << endl;
	cout << "b实际值；" << b << endl;
	cout << endl;

	int c = 3;
	int d = 4;
	mySwap02(&c, &d);//地址传递，形参会修饰实参
	cout << "c实际值；" << c << endl;
	cout << "d实际值；" << d<< endl;
	cout << endl;

	int e = 0;
	int f = 9;
	mySwap03(e, f);//引用传递，形参会修饰实参
	cout << "e实际值；" << e << endl;
	cout << "f实际值；" << f << endl;

	
	system("pause");
	return 0;
}