3.c

#include <stdio.h>

struct books
{
    char title[50];
    char author[50];
    char subject[100];
    int book_id;
};

int main()
{
    struct books bookArray[5];
    printf("Enter Details Of Five Books:\n");
    for (int i = 0; i < 5; i++)
    {
        printf("Book %d:\n", i + 1);
        printf("Title:");
        scanf("%s", bookArray[i].title);
        printf("Author:");
        scanf("%s", bookArray[i].author);
        printf("Subject:");
        scanf("%s", bookArray[i].subject);
        printf("Book id:");
        scanf("%d", &bookArray[i].book_id); 
    }

    printf("Details of the five books entered by the user:\n");
    for (int i = 0; i < 5; i++)
    {
        printf("Title:%s\n", bookArray[i].title);
        printf("Author:%s\n", bookArray[i].author);
        printf("Subject:%s\n", bookArray[i].subject);
        printf("Book_id:%d\n", bookArray[i].book_id);
    }

    return 0;
}