程序代码：

// predef.c -- 预定义标识符
#include <stdio.h>
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("The version is %ld.\n",__STDC_HOSTED__);
    printf("The is line %d.\n",__LINE__);
    printf("The function is %s.\n",__func__);
    why_me ();

    return 0;


}

void why_me()
{
    //printf("This function is %s\n",__func__);
    printf("This is line %d.\n",__LINE__);
}