申明:转自  http://www.cnblogs.com/dzry/archive/2011/05/12/2044835.html 

在说指向指针的指针之前,不得不说指向变量的指针。先看如下示例:

1. 指向整型指针

先看如下示例:

 1 #include <iostream>
 2 using namespace std;
 3 
 4 int main()
 5 {
 6     int a = 5;
 7     int * p = &a;
 8     cout << "a  = " <<  a << endl
 9          << "&a = " << &a << endl 
10          << "*p = " << *p << endl 
11          << "p  = " << p << endl 
12          << "&p = " << &p << endl;
13 
14     return 0;
15 }
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