C++中指針的引用詳解

指針(*)和引用(&),解引用(*)和取地址(&), 主要觀察是在左面, 還是在右面, 如果在左面是前者, 在右面是後者;

如果比較多, 則要認真觀察, 譬如int*&, 就是指針的引用, 可以避免指針內部元素的復制;

還有其他的一些形式, 見下面的例子;

代碼:

/* 
 * test.cpp 
 * 
 *  Created on: 2013.11.12 
 *      Author: Caroline 
 */
      
/*eclipse cdt; gcc 4.7.1*/
      
#include <iostream>  
      
int main (void) {  
      
    int i(10);  
    int* j = &i;  
    int i1(20);  
    int*& k = j; //指針的引用, *k是*j的引用  
    *k = i1; //修改*k所指的內容, 則修改*j的內容;  
      
    typedef int* pint;  
    pint& k2 = j;  
          
    int* k3 = &*j, k4 = 10;  
      
    std::cout << "*k = " << *k <<std::endl;  
    std::cout << "*j = " << *j <<std::endl;  
    std::cout << "*k2 = " << *k2 << std::endl;  
    std::cout << "*k3 = " << *k3 << std::endl;  
    std::cout << "k4 = " << k4 << std::endl;  
      
    return 0;  
      
}

作者：csdn博客 Spike_King