這幾個巨集是編譯器內建的，不是在哪個標頭檔案中包含的
直接上最簡單的例子就好了，沒必要多說。
原始碼：

#include <stdio.h>

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", __FUNCTION__ );	
	
    return 0;
}

[email protected]:~/workspace/allwinner/A40i/study/test11# gcc -o main main.c
[email protected]:~/workspace/allwinner/A40i/study/test11# ls
main  main.c
[email protected]:~/workspace/allwinner/A40i/study/test11# ./main
The file
 
 is main.c.
The date is Jan  3 2021.
The time is 16:03:45.
This is line 8.
This function is main.