Изменение заданной структуры в массиве структур - C (СИ)

void edit(General general)
{
    printf("Enter the typography:    ");
    gets(general.typography);
    printf("Enter the price:     ");
    scanf("%d",&general.price);
    getchar();
    printf("Enter the type of object (1 Book 2 Calendar):    ");
    scanf("%d",&general.typeObj);
    getchar();
    
    if(general.typeObj==1)
    {
        printf("Enter the headline:  ");
        gets(general.choice.book.name);
        printf("Enter the author:    ");
        gets(general.choice.book.author);
        printf("Enter the number of pages:   ");
        scanf("%d",&general.choice.book.pages);
        getchar();
    }   else {
        printf("Enter the type:     ");
        gets(general.choice.calendar.type);
        printf("Enter the format:    ");
        gets(general.choice.calendar.format);
        printf("Enter the size:     ");
        scanf("%d",&general.choice.calendar.size);
        getchar();
    }
 
    puts("");
}

typedef struct Book {
    char name[20];
    char author[20];
    int pages;
}Book;
typedef struct Calendar {
    int size;
    char type[20];
    char format[20];
}Calendar;
typedef union Choice {
    Book book;
    Calendar calendar;
}Choice;
typedef struct General {
    Choice choice;
    TypeObj typeObj;
    char typography[20];
    int price;
}General;