宏的应用

//用于提醒需要修改的代码

#include "stdafx.h"#define __STR2__(x) #x#define __STR1__(x) __STR2__(x)#define __LOC__ __FILE__ "(" __STR1__(__LINE__)"):Warning Msg:"#define __LOC2__ __FILE__ "(" __STR1__(__LINE__)"):"  //__FILE__后面必须是一个字符串//#pragma message(__LOC__ "important part to be changed")//#pragma message(__LOC2__ "error C9901: wish that error would exit")#define FIXME  __pragma(message(__LOC2__ "error C666: found FIXME in release build!"))void main(){int a;int b;FIXMEint c;}