我需要解释这个代码，它的意思是&在C ++中？ [英] I need explanation of this code and what does it mean by & in C++?

问题描述

enum xyz
{
  a, 
  b, 
  c
};

int main()
{
  int x = a, y = b, z = c;
  int &p = x, &q = y, &r = z;

  p = z;
  p = ++q;
  q = ++p;
  z = ++q + p++;

  cout<< p << " " <<; q << " " << z;

  return 0;
}

我的尝试：



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What I have tried:

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推荐答案

代码使用参考声明 - cppreference.com [ ^ 。它是C中不存在的基本C ++语言功能。另请参见标准C ++：参考 [ ^ ]。

The code uses Reference declaration - cppreference.com[^]. It is a basic C++ language feature that does not exist in C. See also Standard C++: References[^].

没有什么神秘的代码...所有你需要做的就是通过你的调试器逐行，逐个命令地运行它...

There is nothing mysterious about that code... All you have to do to understand it is run it via your debugger line-by-line, command-by-command...

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