Librarian's Assistant Program Help

Hi, I need some help with a program.

The software needs to build the software to manage the library, its books, and library card holders.

This project needs to incorporate two main objects, books and cards:

•Book - this class defines the data that makes up a book object and the actions a book object can take. The data consists of:
o A title of the book
o Author
o Book number
o Whether it’s checked out or not
o Who has the book (Card ID of the holder, 0 if checked in)

A book needs to be able to create itself (constructor), check the status, change the status when a book is checked out/in, check who has the book, and change who has the book


•Card - this class defines the data that makes up a library card object and the actions a card object can take. The data consists of:
o Card holder’s name
o Card holder’s phone number
o Card ID number
o The book number of the book checked out (0 if none)

A card needs to be able to create itself (constructor), check any of the variables of the class, and change the book number.

The program needs to have a recurring main menu that reappears after every menu action is completed and must contain the following options.

1.Show all library cards
2.Show all books
3.Check out a book
4.Check in a book
5.Exit the system

I will post my code in subsequent posts below. Any additional tips would be appreciated. Thanks in advance if you can help!
Main code:

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// Description: This program simulates the checking out and checking in of books from a library


#include <iostream>
#include <fstream>
#include "card.h"
#include "book.hpp"
#include <iomanip>
using namespace std;

void ShowMenu();
int findLibraryCard(int card, class card cards[]);
int findbook(int book, class book books[]);


int main()
{


	// declare an array of 20 cards
	card cards[20];
	int numCards = 0;
	int i = 0, j = 0;
	int command = 0;


	// declare an array of 20 books


	// declare a file pointer and open the cards file
	ifstream cardInput("cards.rtf");
	if (!cardInput)
	{
		cout << "ERROR: Cannot open file cards.rtf " << endl;
		system("pause");
		exit(1);
	}

	cout << "File openned.  Reading cards.rtf... " << endl;

	// read the next line from the file
	char name[30];
	char phone[15];
	int cardID;
	char junk[5];

	cardInput.getline(name, 30, ',');

	while (cardInput)
	{
		cardInput.getline(junk, 5, ' ');
		cardInput.getline(phone, 15, ',');
		cardInput.getline(junk, 5, ' ');
		cardInput >> cardID;
		cardInput.getline(junk, 5, '\n');

		//: Update the next empty card
		cards[i].setName(name);
		cards[i].setPhone(phone);
		cards[i].setCardID(cardID);
		numCards++;
		i++;

		cardInput.getline(name, 30, ',');
	}

	for (i = 0; i < numCards; i++)
	{
		cards[i].print();

	}



	// declare a file pointer and open the books file


	// read the next line from the file


	// display main menu
	ShowMenu();
	cout << "Enter a command: ";
	cin >> command;


	while (command != 0)
	{
		switch (command)
		{
		case 1: // Print all cards
			for (i = 0; i < numCards; i++)
			{
				cards[i].printcard();
			}
			break;
		case 2: // print all books
			for (i = 0; i < numBooks; i++)
			{
				books[i].printBook();
			}
			break;

		case 3: // check out a book
			// Ask for CardID
			cout << "Enter a Card Id: ";
			cin >> cardID;

			// Search cards[] for ID
			i = 0;

			while (i < numCards && cardID != cards[i].getCardID())
			{
				i++;
			}
			// If NOT found, Error and stop
			if (i == numCards)
			{
				cout << "ERROR: Card Not Found. Go to create card ID to make one. " << endl;
			}
			else
			{

				// if have a book, error and stop
				if (cards[i].getBookID() != 0)
				{
					cout << "ERROR: Already have a book checked out." << endl;
				}
				else
				{

					// Ask for bookID
					cout << "Enter the BookID: ";
					cin >> bookID;

					// Search books[] for ID
					j = 0;

					while (j < numBooks && bookID != books[j].getBookID())
					{
						j++;
					}

					// if NOT found. error and stop
							// If NOT found, Error and stop
					if (j == numBooks)
					{
						cout << "ERROR: Book Not Found." << endl;
					}
					else
					{

						// if have a book, error and stop
						if (books[j].isCheckedOut())
						{
							cout << "ERROR: Book checked out." << endl;
						}
						else
						{

							// check out the book
							cards[i].setBookID(bookID);

							books[j].setCardID(cardID);
						}
					}
				}
			}
			break;

		case 4: // check in a book
			// Ask for CardID
			cout << "Enter a Card Id: ";
			cin >> cardID;

			// Search cards[] for ID
			i = findLibraryCard(cardID);

			// If NOT found, Error and stop
			if (i >= 0)
			{


				// Ask for bookID
				cout << "Enter the BookID: ";
				cin >> bookID;


				j = findBook(bookID);

				if (j >= 0 && !books[j].isCheckedOut())
				{
					// check out the book
					cards[i].setBookID(0);
					books[j].setCardID(0);
				}




				break;


		case 5: // create a new card
			cout << "Enter your name: ";
			cin >> name; // joe_smith (no spaces in name)

			cout << "Enter your phone number: ";
			cin >> phone;    // Use 999-999-1234 format (no Spaces)

			cout << "Enter a Card ID: ";
			cin >> cardID;

			cards[numCards].setName(name);
			cards[numCards].setPhone(phone);
			cards[numCards].setCardID(cardID);
			numCards++;
			break;

		case 0:


		default:
			cout << " ERROR: Menu options must be between 0 and 5. " << endl;
			}

			ShowMenu();
			cin >> command;
		}


	}
}

void ShowMenu()
{
	cout << endl << endl;
	cout << "    [ M a i n   M e n u]      " << endl;
	cout << "============================  " << endl;
	cout << " 1. show all library cards    " << endl;
	cout << " 2. show all books            " << endl;
	cout << " 3. check out a book          " << endl;
	cout << " 4. check in a book           " << endl;
	cout << " 5. Create a new Library Card " << endl;
	cout << " 0. Exit the system           " << endl;
}




int findLibraryCard(int card, card cards[])
{

	// Search cards[] for ID
	int i = 0;

	while (i < numCards && cardID != cards[i].getCardID())
	{
		i++;
	}
	// If NOT found, Error and stop
	if (i == numCards)
	{
		cout << "ERROR: Card Not Found. Go to create card ID to make one. " << endl;
		return -1;
	}
	else
	{
		return i;
	}
}

int findbook(int book, class book books[])
{
	int j = 0;

	// Search books[] for ID

	while (j < numBooks && bookID != books[j].getBookID())
	{
		j++;
	}

	// if NOT found. error and stop
	// If NOT found, Error and stop
	if (j == numBooks)
	{
		cout << "ERROR: Book Not Found." << endl;

		return -1;
	}
	else
	{
		return j;
	}
}
card.h file

#include <iostream>
using namespace std;

#ifndef Card_H

#define Card_H



class card
{
private:
char name[30];
char phone[15];
int cardID;
int bookID;

public:
card();
card(char n[], char p[], int c[]);
void setCardID(int c);
void setName(char n[]);
void setPhone(char p[]);
void setBookID(int b);
int getBookID();
int getCardID();
void printcard();


};

#endif
book.cpp file:

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#include <iostream>
#include "book.hpp"
using namespace std;




book::book()
{
    bookID = 0;
    CardID = 0;
    CheckedOut = false;
    
}



book::book(int bID, char t[], char a[])

{
    bookID = bID;
    CardID = 0;
    CheckedOut = false;
    strcpy(Title, t);
    strcpy(Author, a);
}

void book::setTitle(char t[])
{
    strcpy(Title, t);
}

void book::setAuthor(char a[])
{
    strcpy(Author, a);
}


bool book::isCheckedOut()
{
    if(CardID == 0)
        CheckedOut = false;
    else
        CheckedOut = true;
    return CheckedOut;
}


void book::setCheckedOut(int c)

{
    
    
}


int book::getCardID()
{
    
    
}

void book::setCardID(int c)
{
    CardID = c;
    
}

void book::printBook()
{
    cout << bookID << "  "
         << Title << "  "
         << Author << "  "
         << (CheckedOut ? "Checked Out":"On Shelf");
         << CardID << endl;
}
book.h file:

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// Description: This program simulates the checking out and checking in of books from a library


#include <iostream>
#include <iomanip>
#ifndef Book_H
#define Book_H

class book{
    
private:
    int bookID;
    char Title[30];
    char Author[25];
    bool CheckedOut;
    int CardID;
    
    
public:
    book();
    book(int bID, char t[], char a[]);
    int getBookID();
    void setBookID(int b);
    void setTitle(char t[]);
    void setAuthor(char a[]);
    bool isCheckedOut();
    void setCheckedOut(int c);
    int getCardID();
    void setCardID(int c);
    void printBook();
};

#endif 
card.c file

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#include <iostream>
#include "card.h" 
using namespace std; 



card::card()
{
    bookID = 0;
    cardID = 0;
    
}


card::card(char n[], char p[], int c[])
{
    cardID = 0;
    strcpy(name, n);
    strcpy(phone, p);
    
}

void card::setCardID(int c)
{
    cardID = c;
}

void card::setName(char n[])
{
    strcpy(name, n);
}

void card::setPhone(char p[])
{
    strcpy(phone, p);
}

void card::setBookID(int b)
{
    bookID = b;
}

int card::getBookID()
{
    
}


void card::printcard()
{
    cout << cardID << "   "
         << name << "  "
         << phone << "  "
    << bookID << endl; 
}
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