include

最近用到了FreeType，稍微看了一点源码，在初始化模块的时候看到了一个include的小技巧(暂且就这么称呼吧)。

我在vs2010上面写了一个小例子。

include_file_function.h文件

#ifndef__INCLUDE_FILE_FUNCTION_H__#define __INCLUDE_FILE_FUNTIONG_H__FORCECHANGE(a)FORCECHANGE(b)FORCECHANGE(c)#endif

include_file_function.c文件

/***************************************File name:include_file_function**Description:测试include文件的作用**Author:****Data:2013-2-25*************************************/#include <stdio.h>unsigned int a = 1;unsigned int b = 2;unsigned int c = 3;#define FORCECHANGE(x) (int *)&(x),static int* mm[]={#include"include_file_function.h"};void main(void){unsigned int i = 0;printf("&a = 0x%p\n", &a);printf("&b = 0x%p\n", &b);printf("&c = 0x%p\n", &c);for(i = 0; i < 3; i++){printf("mm[%d] = 0x%x\n", i, mm[i]);}}

结果为：