ifstream identifier error

[bobanderson93]

the program wont compile because it found and error with ReadFromFile class method in the main.cpp file. Any help would be appreciated.

class inventory deceleration in "Inventory.h" file

#ifndef INVENTORYDEF
#define INVENTORYDEF

#include <iostream>
#include <fstream>

int const MAXNAME=30;
int const SIZE=2;

class Inventory 
{
private:
	int quantity[SIZE]; 
	float unitcost[SIZE];
	char description[SIZE][MAXNAME];
public:
	void ReadFromFile(ifstream);
	void SortByDescription();
	void Output();

};

#endif

this is the main program with class methods "main.cpp" file

#include <iostream>
#include <fstream>
#include "Inventory.h"

using namespace std;

void Inventory::ReadFromFile(ifstream &fin) <-----------Read from file causing error
{
	for(int n=0; n<SIZE; n++)
	{
		fin >> description[n] >> quantity[n] >> unitcost[n];
	}
}

void Inventory::SortByDescription()
{
	BubbleSort(description, SIZE);
}

void Inventory::Output()
{
	
	for(int n=0; n<SIZE; n++)
	{
		cout << description[n] << quantity[n] << unitcost[n];
	}
}

void BubbleSort (char array1[][MAXNAME], int size)
	{
		bool done = false;
		int limit = 0;
		
		while (!done)
		{
			done = true;
			for (int n=0; n<size-limit-1 ; n++)
				if (strcmp(array1[n], array1[n+1]) > 0)
				{
					char temp[MAXNAME]; 
					strcpy_s(temp,array1[n]);
					strcpy_s(array1[n], array1[n+1]);
					strcpy_s(array1[n+1], temp);
					done = false;
				}
		}
	}

int main(void)
{
	Inventory inventory;
	ifstream fin;
	char filename[30];

	cout << "Enter filename: ";
	cin >> filename;
	fin.open(filename);

	inventory.ReadFromFile(fin);
	inventory.SortByDescription();
	inventory.Output();

	return 0;
}

[Ancient Dragon]

Streams must be passed by reference like you did in main.cpp. So change inventory class like this: void ReadFromFile(ifstream&);