学习C++笔记244

int& r = i; 和 int r = i; 不同之处应该是内存的分配吧，后者会再开辟一个内存空间

#include<iostream>

usingnamespace std;

int main ()

{

  int i;

  int& r = i;

  i =5;

  cout <<"Value of i : "<< i << endl;

  cout <<"Value of i reference : "<< r  << endl;

  cout <<"Addr of i: "<<&i << endl;

  cout <<"Addr of r: "<<&r << endl;

  int x;

  int y = x;

  x =6;

  cout <<"Value of x : "<< x << endl;

  cout <<"Value of y : "<< y  << endl;

  cout <<"Addr of x: "<<&x << endl;

  cout <<"Addr of y: "<<&y << endl;

  return0;

}

输出结果：

Value of i :5

Value of i reference :5

Addr of i:0x7fff59cda988

Addr of r:0x7fff59cda988

Value of x :6

Value of y :32767

Addr of x:0x7fff59cda97c

Addr of y:0x7fff59cda978