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宏定义的一个另类用法
阅读量:172 次
发布时间:2019-02-28

本文共 490 字,大约阅读时间需要 1 分钟。

用于定义类型相同,前缀名字相同的变量  

上代码

#include 
using namespace std;#define NAMES \ NAME(a); \ NAME(b); \#define NAME(name) int int_ ## name; NAMES#undef NAME#define NAME(name) char char_ ## name; NAMES#undef NAMEint main(int argc, char *argv[]){ int temp = 10; int_a = temp; cout << int_a << endl; cout << int_b << endl; cout << char_a << endl; cout << char_b << endl; return 0;}

 

  • 好处就是,批量修改变量类型和前缀的时候,方便一些。
  • 如果定义的同类型同前缀变量不是很多,建议不要用这种方式,调试不易,阅读起来也要拐个小弯。

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