#include <stdio.h>

#include <string.h>        

struct Books {

    char  title[];

    char  author[];

};        

union Data {

    char  title[];

    char  author[];

};

main() {        

    union Data _u;

    struct Books _s;    

    printf( "struct : %d\n", sizeof(_s));

    printf( "union大小 : %d\n", sizeof(_u));    

    /*********************struct***********************/

    strcpy( _s.title, "C Programming");

    printf( "union：title : %s\n", _s.title);

    strcpy( _s.author, "Andy Bob");

    printf( "union：title : %s\n", _s.title);

    /*********************union***********************/

    strcpy( _u.title, "C程序设计");

    printf( "struct：title : %s\n", _u.title);

    // 被覆盖

    strcpy( _u.author, "谭浩强");

    printf( "struct：title : %s\n", _u.title);

    return ;

}