Library-using typedef, enum, struct and dynamic memory allocation(C lang)

Virtual Database Library -in C lang-(use of typedef,enum,struct and dynamic memory allocation)

#include <stdio.h>

#include <stdlib.h>

typedef enum lang

{

    Hindi,

    Marathi,

    English,

    Urdu,

    Sanskrit,

    Other

} lang;

typedef struct book_data

{

    int page_no;

    char *dataPage;

} book_data;

typedef struct book

{

    lang book_lang;

    char *book_name;

    int pages;

    book_data *bookData;

} book;

typedef struct

{

    int no_of_books;

    book *books;

} library;

// store book data

void create_page(library *lib, int book_index,int page_num, char *page_data)

{

    if (lib->books[book_index].pages <= page_num)

    {

        printf("%s :%d Page not conatain in this book.",lib->books[book_index].book_name,page_num);

        return;

    }

    lib->books[book_index].bookData[page_num].page_no = page_num;

    lib->books[book_index].bookData[page_num].dataPage = (char *)malloc(sizeof(page_data));

    lib->books[book_index].bookData[page_num].dataPage = page_data;

}

// create book

void create_book(library *libr, int book_index, int paget, char *name,lang lan)

{

    libr->books[book_index].book_lang = lan;

    libr->books[book_index].book_name = name;

    libr->books[book_index].pages = paget;

    // book_data data_one;

    libr->books[book_index].bookData = (book_data *)calloc(paget , sizeof(book_data));

}

// create library

void create_lib(library *lib, int num_books)

{

    lib->no_of_books = num_books;

    // book book_one;

    // book_data bookData_one;

    lib->books = (book *)malloc(num_books * sizeof(book));

}

int main()

{

    library library_one, library_two, library_three;

    library *libraries[3] = {&library_one, &library_two, &library_three};

   

    //creating library compartment to store books of particular lang.

    create_lib(libraries[0], 100);

    //creating first book int it

    create_book(libraries[0], 0 ,120, "Kaphan",Hindi);

    create_book(libraries[0], 1 ,1, "Harry Potter",English);     //2nd book

   

    //creating page and storing data in it

    //create_page(libraries[index],book index,page number,data)

    create_page(libraries[0], 0 ,0, "Kaphan : Welcome to the first page");

    create_page(libraries[0], 0 ,1, "Kaphan : Welcome to the second page");

    create_page(libraries[0], 0 ,2, "Kaphan : Welcome to the third page");    

    printf("\n");

    create_page(libraries[0], 1 , 0, "Harry: Welcome to the first page");

    create_page(libraries[0], 1 ,100, "Harry: Welcome to the second page");

   

    printf("\n\n");

    printf("No. of Books Stored in Lirary : %d\n", libraries[0]->no_of_books);

    printf("No. of Pages in %s book :%d\n",libraries[0]->books[0].book_name, libraries[0]->books[0].pages);

    printf("Present Page number :%d\n", libraries[0]->books[0].bookData[1].page_no);

    printf("Data in %d(th) page of %s  :%s\n", libraries[0]->books[0].bookData[0].page_no+1,libraries[0]->books[0].book_name,libraries[0]->books[0].bookData[0].dataPage);

    printf("Data in %d(th) page of %s  :%s\n", libraries[0]->books[0].bookData[2].page_no+1,libraries[0]->books[0].book_name,libraries[0]->books[0].bookData[2].dataPage);

    printf("Data in %d(th) page of %s  :%s\n", libraries[0]->books[1].bookData[0].page_no+1,libraries[0]->books[1].book_name,libraries[0]->books[1].bookData[0].dataPage);

    return 0;

}