C语言预定义的宏

// --------------------------------------
#include <stdio.h>

main() {

   printf("File :%s/n", __FILE__ );
   printf("Date :%s/n", __DATE__ );
   printf("Time :%s/n", __TIME__ );
   printf("Line :%d/n", __LINE__ );
   printf("ANSI :%d/n", __STDC__ );

}