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ANSI C标准中有几个标准预定义宏: __LINE__:在源代码中插入当前源代码行号; __FILE__:在源文件中插入当前源文件名; __DATE__:在源文件中插入当前的编译日期 __TIME__:在源文件中插入当前编译时间;
__func__: 当前所在函数名,在编译器的较高版本中支持__FUNCTION__: 当前所在函数名
使用实例
#include运行结果#include void why_me();int main(){ printf( "The file is %s.\n", __FILE__ ); printf( "The date is %s.\n", __DATE__ ); printf( "The time is %s.\n", __TIME__ ); printf( "This is line %d.\n", __LINE__ ); printf( "This function is %s.\n", __func__ ); why_me(); return 0;}void why_me(){ printf( "This function is %s\n", __func__ ); printf( "The file is %s.\n", __FILE__ ); printf( "This is line %d.\n", __LINE__ );}
The file is debug.c.The date is Jun 6 2012.The time is 09:36:28.This is line 11.This function is main.This function is why_meThe file is debug.c.This is line 22.
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