C/C++º¯Êý²ÎÊý,´«ÖµÓò´«Ö·!!!

/*
* File: main.cpp
* Author: Vicky
*
* Created on 2010Äê5ÔÂ8ÈÕ, ÏÂÎç2:47
*/
#include <iostream>
using namespace std;
void swap(int x, int y) {
cout << "x and y swap before : " << x << "\t" << y << endl;
int i = x;
x = y;
y = i;
cout << "x and y swap after : " << x << "\t" << y << endl;
}
void swap2(int * x, int * y) {
cout << "x and y swap before : " << *x << "\t" << *y << endl;
int * i = x;
x = y;
y = i;
cout << "x and y swap after : " << *x << "\t" << *y << endl;
}
/**
* ×¢Òâ,´Ë´¦·Ç&xÓë&y²¢·ÇµØÖ·,¶øÊǶÔÏóµÄ±ðÃû!!!
*/
void swap3(int &x, int &y) {
cout << "x and y swap before : " << x << "\t" << y << endl;
int i = x;
x = y;
y = i;
cout << "x and y swap after : " << x << "\t" << y << endl;
}
/**
* °´Ö·´«µÝ,´«µÝµÄ²ÎÊýÊǵØÖ·.
*/
void swap4(int * x, int * y) {
cout << "x and y swap before : " << *x << "\t" << *y << endl;
int i = *x;
*x = *y;
*y = i;
cout << "x and y swap after : " << *x << "\t" << *y << endl;
}
int main(int argc, char** argv) {
int x = 1;
int y = 9;
cout << "main function swap before : " << x << "\t" << y << endl;
swap(x, y);
cout << "main function swap after : " << x << "\t" << y << endl;
// ¿É½«,Ö÷º¯ÊýµÄxÓëy²¢Ã»Óн»»»,±íʾswapº¯Êý½»»»µÄ½ö½öÊÇxÓëyµÄ¸±±¾
cout << "---------" << endl;
int * px = new int(1);
int * py = new int(9);
cout << "main function swap before : " << *px << "\t" << *py << endl;
swap2(px, py);
cout << "main function swap after : " << *px << "\t" << *py << en