指針的引用 詳解 及 代碼
本文位址: http://blog.csdn.net/caroline_wendy/article/details/16863409
指針(*)和引用(&),解引用(*)和取位址(&), 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, 可以避免指針内部元素的複制;
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所指的内容, 則修改*j的内容;
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;
}