Write a program to create Book(ISBN, Title, Author, Price, Pages, Publisher) structure and store book details in a file and perform the following operations

• Add book details
• Search a book details for a give ISBN and display book details, if available.
• Update a book details using ISBN
• Delete book details for a given ISBN and display list of remaining Books.

#include <stdio.h>
struct Book
{
    long ISBN;
	char Title[20];
	char Author[20];
	float Price;
	int Pages;
	char Publisher[20];
};
FILE *file;
void add();
void search();
void update();
void delete();
void display();
void input(struct Book*);
int main()
{
	int choice;
	do
	{
		printf("Main Menu\n");
        		printf("1.Add Book\n");
        		printf("2.Search\n");
        		printf("3.Update\n");
        		printf("4.Delete\n");
        		printf("5.Display\n");
        		printf("6.Exit\n");
        		printf("Enter your choice : ");
        		scanf("%d",&choice);
		switch(choice)
		{
			case 1:	add();
				break;
			case 2:	search();
				break;
			case 3:	update();
				break;
			case 4:	delete();
				break;
			case 5:	display();
				break;
		}
	}while(choice != 6);
	return 0;
}

void add()
{
	struct Book data;
    file = fopen("books.dat", "ab");
    printf("Please enter Book details : \n");
    input(&data);
    fwrite(&data, sizeof(data), 1, file);
    fclose(file);
    printf("Book details added \n\n");	
}

void input(struct Book *b)
{
    printf("Enter ISBN : ");
    scanf("%ld", &b->ISBN);
    fflush(stdin);
    printf("Enter Title : ");
    gets(b->Title);
    printf("Enter Author : ");
    gets(b->Author);
    printf("Enter price : ");
    scanf("%f", &b->Price);
    printf("Enter pages : ");
    scanf("%d", &b->Pages);
    printf("Enter Publisher : ");
    gets(b->Publisher);
} 

void display()
{
    struct Book data;
    printf("\n\nDISPLAY ALL RECORD !!!\n");
    file = fopen("student.dat", "rb");
    while((fread(&data, sizeof(data), 1, file)) > 0)
    {
        printf("ISBN number : %ld \n", data.ISBN);
        printf("Title : %s \n", data.Title);
        printf("Author : %s \n", data.Author);
        printf("Price : %f \n", data.Price);
        printf("Pages : %d \n", data.Pages);
        printf("Publisher : %s \n", data.Publisher);
        printf("====================================\n\n");
    } 
	fclose(file);
} 

void update()
{
    struct Book data;
    long num;
	int found=0;

    printf("Enter ISBN number : ");
    scanf("%ld", &num);
    file = fopen("student.dat", "rb+");
    while((fread(&data, sizeof(data), 1, file)) > 0 && found == 0)
    {
        if(data.ISBN == num)
        {
            printf("Please Enter New details : \n");
            input(&data);
            fseek(file, -(long)sizeof(data), 1);
            fwrite(&data, sizeof(data), 1, file);
            printf("Record Updated\n\n");
            found = 1;
        } 
    }
    fclose(file);
    if(!found)
        printf("Record Not Found \n\n");
}

void search()
{
    struct Book data;
    long num;
	int found=0;

    printf("Enter ISBN number : ");
    scanf("%ld", &num);
    file = fopen("student.dat", "rb+");
    while((fread(&data, sizeof(data), 1, file)) > 0 && found == 0)
    {
        if(data.ISBN == num)
        {
            printf("ISBN number : %ld \n", data.ISBN);
        	printf("Title : %s \n", data.Title);
        	printf("Author : %s \n", data.Author);
        	printf("Price : %f \n", data.Price);
        	printf("Pages : %d \n", data.Pages);
        	printf("Publisher : %s \n", data.Publisher);
        	printf("====================================\n\n");
            found = 1;
        } 
    }
    fclose(file);
    if(!found)
        printf("Record Not Found \n\n");
}

void delete()
{
    long num;
    struct Book data;
    FILE *file2;
    printf("Please Enter ISBN number : ");
    scanf("%ld", &num);
    file = fopen("books.dat", "rb");
    file2 = fopen("temp.dat", "wb");
    rewind(file);
    while((fread(&data, sizeof(data), 1, file)) > 0)
    {
        if (data.ISBN != num)
        {
            fwrite(&data, sizeof(data), 1, file2);
        } 
    }
    fclose(file2);
    fclose(file);
    remove("book.dat");
    rename("temp.dat", "book.dat");
    printf("Record deleted\n\n");
}