freestandingreferences.cpp

来自「ThinkingC++中文版」· C++ 代码 · 共 29 行

//: C11:FreeStandingReferences.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 2000
// Copyright notice in Copyright.txt
#include <iostream>
using namespace std;


void main() {
	// Ordinary free-standing reference:
	int y;
	int& r = y;
	// When a reference is created, it must be initialized to a live object. However, you can also say:
	const int& q = 12;  // (1)
	// References are tied to someone else's storage:
    const int a = 200;
	const int& k = a;//常量引用
//	const int& k = y;//ok 
//  k = 20; //error
	int* pi = &y;
	int* & pj = pi;//pj为整数指针的引用
/*
	int x = 0;          // (2)
    int& *p;
    p = &x         // (3)
*/ 
} ///:~