freestandingreferences.cpp

来自「thingking in c++（C++编程思想） 各章节课后练习的答案」· C++ 代码 · 共 24 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;

// 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:
int x = 0;          // (2)
int& a = x;         // (3)
int main() {
  cout << "x = " << x << ", a = " << a << endl;
  a++;
  cout << "x = " << x << ", a = " << a << endl;
} ///:~