Write a menu driven program that depicts the working of a library. The menu options should be:

1. Add book information
2. Display book information
3. List all books of a given author
4. List the title of specified book
5. List the count of books in the library
6. List the books in the order of accession number
7. Exit

Create a structure called the library to hold accession number, the title of the book, author name, price of the book, and the flag indicating whether the book is issued or not.

#include<stdio.h>
#include<conio.h>
#include<string.h>
#include<Windows.h>

/*Count total number of books in the library*/
int count();

void display(int);

/*If the author name is same so the function strcmp returns a zero*/
void giv_author(char*);
void adbuk();

/*Appears the title of the specified book*/
void which1(int);

/*Displays all the books serially accession number*/
void albuk();

struct library
{
	int an;/*Accession number*/
	char title[50];
	char author[30];
	int price;
	int flag;/*flag = 0 : Issued and,flag =  1: not issued*/
}geclib[50] = {
	1, "Let Us C", "Yashavant Kanethkar", 258, 1,
	2, "Data Structure Through C", "Yashavant Kanethkar", 300, 1,
	3, "Let Us C++", "Yashavant Kanethkar", 220, 1,
	4, "Harry Potter : The Philosopher's Stone", "J. K. Rowling", 550, 0,
	5, "The Two Towers", "J. R. R. Tolkien", 560, 0,
	6, "The Hobbit", "J. R. R. Tolkien", 550, 1,
	7, "The Fellowship of the Ring", "J. R. R. Tolkien", 550, 0
};

int main()
{
	int ans = 1, an;
	char auth[30];
	while (ans != 7)
	{
		system("cls");
		printf("\nYou are in menu section\n");
		printf("\n1. Add Book Information");
		printf("\n2. Display Book Information");
		printf("\n3. List all books of given author");
		printf("\n4. List the title of specified book");
		printf("\n5. List the counts of the books in library");
		printf("\n6. List the books in order of accession number");
		printf("\n7. Exit");
		printf("\n\n\t\tEnter you choice : ");
		scanf("%d", &ans);
		switch (ans)
		{
		case 1:
			adbuk();
			_getch();
			break;
		case 2:
			printf("\nEnter the accession number of the book : ");
			scanf("%d", &an);
			display(an);
			_getch();
			break;
		case 3:
			while (getchar() != '\n');
			printf("Enter the name of the author (case sensitive) : ");
			gets_s(auth);
			giv_author(auth);
			_getch();
			break;
		case 4:
			printf("\nEnter the accession number of book : ");
			scanf("%d", &an);
			which1(an);
			_getch();
			break;
		case 5:
			printf("\nTotal Number of books : %d", count());
			_getch();
			break;
		case 6:
			albuk();
			_getch();
			break;
		case 7:
			return 0;
		default:
			printf("\nWrong choice, Try Again!!");
			_getch();

		}
	}
	_getch();
	return 0;
}

int count()
{
	int i = 0;
	while (geclib[i].an)
		i++;
	return i;
}

void display(int i)
{
	i--;/*To use i as index*/
	printf("\n\n\n");
	printf("\nAccession Number : %d", geclib[i].an);
	printf("\nTitle : %s", geclib[i].title);
	printf("\nAuthor : %s", geclib[i].author);
	printf("\nPrice : %d", geclib[i].price);
	if (geclib[i].flag)/*Flag : 0*/
		printf("\nStatus : Issued");
	else
		printf("\nStatus : Available");/*Flag : 1*/
}

void giv_author(char *author)
{
	int i = 0;
	printf("\nBooks of \"%s\" are following : \n\n", author);
	while (geclib[i].an)
	{
		if (!(strcmp(author, geclib[i].author)))
			display(geclib[i].an);
		i++;
	}
}

void adbuk()
{
	int next = count();
	geclib[next].an = next + 1;

	/*fflush(stdin) or while(getch() != '\n'); to clear the buffer*/
	while (getchar() != '\n');
	printf("\nEnter the title of the book : ");
	gets_s(geclib[next].title);
	printf("\nEnter the author name of the book : ");
	gets_s(geclib[next].author);
	printf("\nEnter the price of the book : ");
	scanf("%d", &geclib[next].price);
	geclib[next].flag = 1;
	system("cls");
}

void which1(int an)
{
	int i = 0;
	while (geclib[i].an)
	{
		if (geclib[i].an == an)
		{
			printf("\n\nTitle of the book : %s\n", geclib[i].title);
			return;
		}
	}
	printf("No any book found found\n");
}

void albuk()
{
	int i = 0;
	while (geclib[i].an)
	{
		display(i + 1);
		i++;
	}
}