I apologize, but I meant to make the below post in the C/C++ forum. I'm not sure how I may move it to the other forum or delete it and repost it in the correct forum. I would appreciate any guidance on how to correct my mistake. Thank you.
I'm using an array of class instances to store an inventory of a book store program I'm writing for school. Upon selling a book, I would like to have the instance storing the data on the sold book deleted out so that the book won't show the next time I display the inventory. I've been working on this for a while, but seem to be stuck. Any ideas? Here is the code I've written so far.
#include <iostream>
#include <iomanip>
#include <string>
#define MAX 100 //Maximum number of books in inventory array
using namespace std;
class CBooks //Class definition
{
public:
//Constructor
CBooks(){string m_bookName; string m_author; string m_isbn;}
//Destructor
~CBooks(){};
//Functions
void inputBooks(void);
void displayBooks(void);
void getProfit(void);
void viewProfit(void);
private:
string m_bookName; //Name of book
string m_author; //Author of book
string m_isbn; //ISBN of book
float m_price; //Price of book
float m_profit; //Profit of book sale
float m_totalProfit; //Total of all profits
int m_choice; //Number of book chosen for purchase
}inventory[MAX]; //Array of class objects
//Global variables
int current; //Used to count number of books in inventory
//Main Function
int main()
{
//Declare variables
int x = 0, transaction, another = 2;
string password;
while (another != 1)
{
system("CLS");
//display section header
cout << "***********************\n";
cout << "*Team A Book Inventory*\n";
cout << "***********************\n\n";
cout << "Please type the number of the desired action and press <ENTER>:\n" ;
cout << "1. Buy\n";
cout << "2. Sell\n";
cout << "3. View Profit\n";
cin >> transaction;
cin.ignore(); //statement is necessary in order to make cin.getline() to work properly.
//Tells cin to ignore the line feed at the end of input
//code to view profit
if (transaction == 3)
{
inventory[x].viewProfit();
}
// code to sell a textbook
if (transaction == 2)
{
if (x<=99)
{
system("CLS");
//display section header
cout << "***********\n";
cout << "*Sell Book*\n";
cout << "***********\n\n";
inventory[x].inputBooks();
x++;
}
else
{
cout << "I'm sorry, the database cannot hold any more books.\n"; //print if more then 100 books in inventory
}
}
//code to buy book
if (transaction == 1)
{
system("CLS"); //clear screen
//display section header
cout << "**********\n";
cout << "*Buy Book*\n";
cout << "**********\n\n";
cout << "Book Name " << "Book Author " << "ISBN " << "Price\n"; //print buy header
cout << "--------- " << "----------- " << "---- " << "-----\n\n"; //print buy header
inventory[x].displayBooks();
}
cout << "\nPlease type the number of the desired action and press <ENTER>:\n"; //print option make another trans
cout << "1. Quit program\n"; //quit program
cout << "2. Make another transaction\n"; //make another trans
cin >> another; //get answer
if (another == 1) //check if user selected exit
{
cout << "WARNING!! Data will be lost if program is exited. Are you sure you want to exit?\n"; //print warning about loosing data
cout << "1. Yes, please exit.\n";
cout << "2. No, stay in program.\n";
cin >> another; //get answer again
}
}
return 0;
}
//Input books into inventory function
void CBooks::inputBooks(void)
{
cout << "Please enter the book's name: \n";
getline(cin, m_bookName);
cout << "Please enter the book's author: \n";
getline(cin, m_author);
cout << "Please enter the book's ISBN: \n";
getline(cin, m_isbn);
cout << "Please enter the desired price: \n";
cin >> m_price;
cin.ignore();
//Increments the number of books entered into inventory
current++;
cout << "\nThere are now " << current << " books for in our inventory.\n";
}
//Diplay books in inventory function
void CBooks::displayBooks(void)
{
int loop;
for (loop = 0; loop < current; loop++)
{
cout << inventory[loop].m_bookName << " ";
cout << inventory[loop].m_author << " ";
cout << inventory[loop].m_isbn << " ";
cout << inventory[loop].m_price << "\n";
}
cout << "\nPlease enter the number of the book you would like to buy:\n";
cin >> m_choice; //the number choosen
cout << "Thank you for your purchase!\n\n";
//Calculates 10% profit and updates total profit
m_profit = inventory[m_choice - 1].m_price * .10;
m_totalProfit += m_profit;
}
//Checks password and diplays profit
void CBooks::viewProfit()
{
string password;
system("CLS");
//display header section
cout << "*************\n";
cout << "*View Profit*\n";
cout << "*************\n\n";
cout << "Please type your password:\n";
cin >> password;
if (password == "upwd") //check password
{
cout << "Profit = $" << fixed << showpoint << setprecision(2)
<< m_totalProfit << "\n";
}
else
{
cout << "Invalid password.\n";
}
system("PAUSE");
}
