写一个结构，在宏定义里面，但是赋初始值的时候出错了...请教下

#include<stdio.h>
#include<conio.h>
#define STU struct stu
STU
{
        int num;
        char name[20];
        char sex;
        float score;
};
main()
    STU boy1,boy2={1001,"ZhuangTT",'B',159.22};
    boy1=boy2;
    printf("Number=%d\n,Name=%s\n,Sex=%c\n,Score=%f\n",boy1.num,boy1.name,boy1.sex,boy1.score);
    getch();
}

#include<stdio.h>
#include<conio.h>
#define STU struct stu
STU
{
        int num;
        char name[20];
        char sex;
        float score;
};
main()
{   
    STU boy1,boy2={1001,"ZhuangTT",'B',159.22};
    boy1=boy2;
    printf("Number=%d\n,Name=%s\n,Sex=%c\n,Score=%f\n",boy1.num,boy1.name,boy1.sex,boy1.score);
    getch();
}
你是说哪错了呢?不就是少了一个"{"么?