#include <stdio.h>

int main(void){

    //define a struct
    struct book{
        char id;
        int score;
    };
    //declare a struct variable b1
    struct book b1;
    //using dot to manipulate members.
    b1.id='1';
    b1.score=60;
    printf("id, %c\n", b1.id);
    printf("score, %d\n", b1.score);


    return 0;
}