061.指针-指针和函数

#include <iostream>
using namespace std;
void swap01(int a, int b)
{
    int temp = a;
    a = b;
    b = temp;
    cout << "swap01中a=" << a << endl;
    cout << "swap01中b=" << 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，可以修饰实参
    swap02(&a, &b);
    cout << "a=" << a << endl;
    cout << "b=" << b << endl;

    system("pause");
    return 0;
}