Answer to Question #202227 in C for Muhammad Haris

Question

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

Answer 1

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


//Create a structure called library to hold accession number, title of the book, author name,  price of the book, and flag indicating whether book is issued or not. 
struct Library
{
	int accessionNumber;
	char bookTitle[50];
	char bookAuthor[50];
	float bookPrice;
	int bookIsIssued;
};




void sortBooksInOrderAccessionNumber(struct Library myLibrary[],int size) {
	int i, j, indexmin;
	struct Library temp;
	for(i = 0; i<size-1; i++) {
		indexmin = i;  
		for(j = i+1; j<size; j++)
			if(myLibrary[j].accessionNumber < myLibrary[indexmin].accessionNumber)
				indexmin = j;


		
		temp = myLibrary[i];
		myLibrary[i] = myLibrary[indexmin];
		myLibrary[indexmin] = temp;
	}
}




int main(void){
	struct Library myLibrary[100];
	int totalBooks=0;
	int choice=-1;
	int index=-1;
	int i;
	int accessionNumberTarget;
	char bookAuthorTarget[50];
	char bookTitleTarget[50];


	while(choice!=7){
		//display main menu
		printf("1. Add book information\n");
		printf("2. Display book information\n");
		printf("3. List all books of given author\n");
		printf("4. List the title of specified book\n");
		printf("5. List the count of books in the library\n");
		printf("6. List the books in the order of accession number\n");
		printf("7. Exit\n");     
		printf("Your choice: ");
		scanf("%d",&choice);


		if(choice==1){//Add book information
			printf("Enter the book accession number: "); 
			scanf("%d",&myLibrary[totalBooks].accessionNumber);
			fflush(stdin);
			printf("Enter the book title: "); 
			gets(myLibrary[totalBooks].bookTitle);
			printf("Enter the book author: "); 
			gets(myLibrary[totalBooks].bookAuthor);
			printf("Enter the book price: "); 
			scanf("%f",&myLibrary[totalBooks].bookPrice);
			myLibrary[totalBooks].bookIsIssued=-1;
			while(myLibrary[totalBooks].bookIsIssued!=1 && myLibrary[totalBooks].bookIsIssued!=0){
				printf("Is the book issued? 1- yes, 0 - no: "); 
				scanf("%d",&myLibrary[totalBooks].bookIsIssued);
			}
			totalBooks++;
			printf("\n\nA new book has been added successfully.\n\n");
		}else if(choice==2){//Display book information
		if(totalBooks==0){
				printf("\nThe library is empty.\n\n");
			}else{
				index=-1;
				printf("Enter the book accession number to display: "); 
				scanf("%d",&accessionNumberTarget);
				for(i=0;i<totalBooks;i++){
					if(myLibrary[i].accessionNumber==accessionNumberTarget){
						index=i;
					}
				}
				if(index!=-1){
					printf("\n%-20s%-20s%-20s%-20s%-20s\n","Accession Number","Book title","Book author","Book price","Book is issued");
					printf("%-20d%-20s%-20s%-20.2f%-20d\n\n",myLibrary[index].accessionNumber,myLibrary[index].bookTitle,myLibrary[index].bookAuthor,myLibrary[index].bookPrice,myLibrary[index].bookIsIssued);
				}else{
					printf("\nThe book does not exist.\n\n");
				}
			}
		}else if(choice==3){//List all books of given author
			if(totalBooks==0){
				printf("\nThe library is empty.\n\n");
			}else{
				fflush(stdin);
				printf("Enter the book author to list: "); 
				gets(bookAuthorTarget);
				index=-1;
				printf("\n\n%-20s%-20s%-20s%-20s%-20s\n","Accession Number","Book title","Book author","Book price","Book is issued");
				for(i=0;i<totalBooks;i++){
					if(strcmp(myLibrary[i].bookAuthor,bookAuthorTarget)==0){
						index=i;
						printf("%-20d%-20s%-20s%-20.2f%-20d\n",myLibrary[i].accessionNumber,myLibrary[i].bookTitle,myLibrary[i].bookAuthor,myLibrary[i].bookPrice,myLibrary[i].bookIsIssued);
					}
				}
				if(index==-1){
					printf("\nThe books do not exist.\n\n");
				}
			}
		}else if(choice==4){//List the title of specified book
			if(totalBooks==0){
				printf("\nThe library is empty.\n\n");
			}else{
				fflush(stdin);
				printf("Enter the book title to list: "); 
				gets(bookTitleTarget);
				index=-1;
				printf("\n\n%-20s%-20s%-20s%-20s%-20s\n","Accession Number","Book title","Book author","Book price","Book is issued");
				for(i=0;i<totalBooks;i++){
					if(strcmp(myLibrary[i].bookTitle,bookTitleTarget)==0){
						index=i;
						printf("%-20d%-20s%-20s%-20.2f%-20d\n",myLibrary[i].accessionNumber,myLibrary[i].bookTitle,myLibrary[i].bookAuthor,myLibrary[i].bookPrice,myLibrary[i].bookIsIssued);
					}
				}
				if(index==-1){
					printf("\nThe books do not exist.\n\n");
				}
			}
		}else if(choice==5){// List the count of books in the library
			if(totalBooks==0){
				printf("\nThe library is empty.\n\n");
			}else{
				printf("\nThe total number of books in the library: %d\n\n",totalBooks);
			}
		}else if(choice==6){// List the books in the order of accession number
			if(totalBooks==0){
				printf("\nThe library is empty.\n\n");
			}else{
				sortBooksInOrderAccessionNumber(myLibrary,totalBooks);
				printf("\n\n%-20s%-20s%-20s%-20s%-20s\n","Accession Number","Book title","Book author","Book price","Book is issued");
				for(i=0;i<totalBooks;i++){
					printf("%-20d%-20s%-20s%-20.2f%-20d\n",myLibrary[i].accessionNumber,myLibrary[i].bookTitle,myLibrary[i].bookAuthor,myLibrary[i].bookPrice,myLibrary[i].bookIsIssued);
				}
			}
		}else if(choice==7){
			//exit
		}else{
			printf("Wrong choice.\n\n");
		}


	}
}