Thread: Array of class objects

I am trying to take input from a file and and insert them into an Array of class objects. I am having some trouble understanding this can anyone help.

The text file contains a name, price, and quantity.

Pleaes ignore the comments Ithose were just things I was playing around with.

Essentially I am trying to modify my program so that the machine doesn't have built in data; it in fact will now have data programed into it via a file...

Code:

#include <iostream>
#include <iostream>
#include <fstream>
#include <string>
#include <stdio.h>

#include "CashRegister.h"
#include "dispenserType.h"

using namespace std;

//void showSelection(string, int);
void showSelection();
void sellProduct(dispenserType& product, cashRegister& pCounter);

//dispenserType productlist[8];
//struct productsinfo
//{
//	string name;
//	int noi;
//	int cost;
//}

int main()
{

	ifstream inStud;
	
	inStud.open("items.txt");
	if (!inStud)
	{
		cout <<"**  Can't open input file Stud**"<< endl;
		return 1;
	}


	Get_Inf(inStud, StudDB[])


	//dispenserType obj[8];

	//ifstream inF1;

	//int i = 0;

	//while(!inF1.eof())
	//{
	//		inF1 >> obj[i].name;
	//		intf1 >> obj[i].numberOfItems;
	//		inf1 >> obj[i].cost;
	//	    i++; 
	//}



	cashRegister counter;
	dispenserType candy (100, 50);
	dispenserType chips (100, 65);
	dispenserType gum (75, 45);
	dispenserType cookies (100, 85); 
	
	int choice;
		
	//cout << "*** Welcome to Shelly's Candy Shop ***" << endl;
		//for (int a = 0; a < 8; a ++)
		//{
			//showSelection(obj[a].name, a);
		//}
		//cout << "Press 99 to exit" << endl;

	//cin >> choice;

	
	showSelection();
	cin >> choice;
	
	while (choice !=9)
	{
		switch (choice)
		{
		case 1:
			sellProduct (candy, counter);
			break;
		case 2:
			sellProduct (chips, counter);
			break;
		case 3:
			sellProduct (gum, counter);
			break;
		case 4:
			sellProduct (cookies, counter);
			break;
		default:
			cout << "Invalid selection." << endl;
		}
		
		//cout << "*** Welcome to Shelly's Candy Shop ***" << endl;
		//for (int a = 0; a < 8; a ++)
		//{
		//	showSelection(obj[a].name, a);
		//}
		//cout << "Press 99 to exit" << endl;

		//cin >> choice;

		showSelection();
		cin >> choice;
	}

	return 0;
}

//void showSelection(string whatever, int a)
//{
	
//	cout << "Press", a+1, "for", whatever << endl;
//}

void showSelection()
{
	cout <<"*** Welcome to Shelly's candy Shop ***" << endl;
	cout <<"To select an item, enter " << endl;
	cout <<"1 for Candy" << endl;
	cout <<"2 for Chips" << endl;
	cout <<"3 for Gum" << endl;
	cout <<"4 for Cookies" << endl;
	cout <<"9 to exit" << endl;
}

void sellProduct(dispenserType& product, cashRegister& pCounter)
{
	int amount;
	int amount2;

	if (product.getNoOfItems() > 0)
	{
		cout << "Please deposit " << product.getCost()
			 << " cents" << endl;
		cin >> amount;

		
		while (amount  < product.getCost())
		{
			cout << "Please deposit another "
				 << product.getCost() - amount
				 << " cents" << endl;
			cin >> amount2;
			amount = amount + amount2;
		}

		if (amount >= product.getCost())
		{
			pCounter.acceptAmount(amount);
			product.makeSale();
			cout << "Collect your item at the bootom and "
				 << "enjoy." << endl;
		}
		else
			cout << "the amount is not enough. "
				 << "enjoy." << endl;

		cout << "*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*"
			 << endl << endl;

	}
}

If you want to pass an array, just pass the array by name, you don't need [] at the end.

I would think you should be able to put things in a for loop:

Code:

for (int i = 0; i < SIZE_OF_ARRAY; i++) {
    cin >> list[i].first_thing >> list[i].second_thing >> list[i].third_thing;
}

I need to insert this text file into an array of class objects.

PotatoChip 50 75
FreshGum 100 55
Goldfish 30 55
Snickers 40 75
Pretzels 50 75
MMChocolate 60 75
AnimalCookies 70 55
RiceKrispies 50 55
LifeSavers 25 55

name/quantity/price

I have no idea what you're talking about lol

Originally Posted by GCNDoug

I have no idea what you're talking about lol

Remember those private members you have in the other thread? You're not going to be able to access them except in a member function. So you're going to have to write a member function (dispenserType::readItem, maybe) that has access to those private variables.

Code:

class dispenserType
{
	public:
		int getNoOfItems() const;
		int getCost() const;
		void makeSale();
		dispenserType(int setNoOfItems = 50, int setCost = 50);
		void read(ifstream& readfrom)
		{
			readfrom >> name;
			readfrom >> numberOfItems;
			readfrom >> cost;
		}
	private:
		string name;
		int numberOfItems;
		int cost;
};

like this?

Elysia does this look like the right set up for main in order to send the opened file?

Code:

        ifstream inStud;
	dispenserType productlist[8];

	
	inStud.open("items.txt");
	if (!inStud)
	{
		cout <<"**  Can't open input file items**"<< endl;
		return 1;
	}

	for (int i = 0; i < 8; i ++)
		productlist[i].read(items.txt);

So then how do I send the opened file to the function?

And once i send it will I be able to access all of those class objects anywhere?

Change last two lines to this?

Code:

	for (int i = 0; i < 8; i ++)
		productlist[i].read(inStud);

Well now I have all the data, I just need to figure out now how to use it lol.