指针的交换

#include<iostream>
using namespace std;
int main(){

int a=99;
int *pa=&a;

int b=88;
int *pb=&b;

cout<<"交换前:"<<endl;
cout<<"pa:"<<pa<<" "<<"pb:"<<pb<<endl;
cout<<"*pa:"<<*pa<<" "<<"*pb:"<<*pb<<endl;

int *pc=pa;/*两指针交换*/
pa=pb;
pb=pc;

cout<<"交换后:"<<endl;
cout<<"pa:"<<pa<<" "<<"pb:"<<pb<<endl;
cout<<"*pa:"<<*pa<<" "<<"*pb:"<<*pb<<endl;

cout<<"a:"<<a<<" "<<"b:"<<b<<endl;

return 0;
}

#include<iostream>
using namespace std;
int main(){

int a=99;
int *pa=&a;

int b=88;
int *pb=&b;

cout<<"交换前:"<<endl;
cout<<"pa:"<<pa<<" "<<"pb:"<<pb<<endl;
cout<<"*pa:"<<*pa<<" "<<"*pb:"<<*pb<<endl;

int pc=*pa;/*两指针交换*/
*pa=*pb;
*pb=pc;

cout<<"交换后:"<<endl;
cout<<"pa:"<<pa<<" "<<"pb:"<<pb<<endl;
cout<<"*pa:"<<*pa<<" "<<"*pb:"<<*pb<<endl;

cout<<"a:"<<a<<" "<<"b:"<<b<<endl;

return 0;
}

备注：指针存储的是地址.