Thread: Using Vectors (cont) - Sort Problem

Hello again,
This is a continuation of the vector vs fixed-size array issue because I couldn't let it alone.

I got the code to work as it should using vectors instead of fixed-size arrays, but I didn't like the product numbers displayed out of order, for selection 'B.' So, I decided to try a sort. After thinking about it for a while, I figured out a way but there is an MDE error that I am getting and don't know how to fix it. I should say I am using Visual Studio 2003.

The sort happens and the display is correct, but the new text file isn't populated until I hit the yes button on the pop-up box.

I have the file sort function call at the very top of main() and the function outside of main at the end. I tried a similar sort all by itself in another project and everything worked fine, so I think that it is because it is inside of main and doesn't close before being used in main(). But, I am not sure.

Can anyone help?

This is my code:

Code:

#include <iostream>	
#include <fstream>
#include <string>
#include <cassert>
#include <vector>
#include <iomanip>
#include <algorithm>
using namespace std;

int fileSort();

int main()
{
	fileSort();

	// menu for user 
	const string MENU = "\nPlease select your inventory search option:"
						"\n A - To search by product number"
						"\n B - To display a list of the entire product line."
						"\n Enter your selection ===>  ";
	// program banner
	cout << "\nThis program queries the inventory list of Rinky Dooflingy Co."
		 << "\nfor the price by item number or it displays the entire inventory"
		 << "\nlist.\n"
		 << MENU;
	//read in inventory file
	ifstream readInFile("InventorySort.txt");
	assert(readInFile.is_open());
	// vector and temporary variable declarations
	vector<double> productNumber;
	vector<double> productPrice;
	double number;
	double price;
	// read data in from file to two temporary variable holders
	while (readInFile >> number >> price)
	{
		// populate vectors with new variable data
		productNumber.push_back(number);
		productPrice.push_back(price);
	}
	// request menu option from user
	char userChoice;
    cin >> userChoice;
    // display data as user requested    
	switch (userChoice)
	{
		// prompt user for item number
        case 'A':
		case 'a':
			cout << "\nEnter the product number:  ";
			// get item number
			double pNumber;
			cin >> pNumber;
			// search through productNumber data for item number match
			for (int i = 0; i < productNumber.size(); i++)
				if(pNumber == productNumber[i])
					// display data if a match is found
					cout << "\n\t" << "Item: " << setprecision(0) << productNumber[i]
						 << "   Price: $" << right << fixed << setprecision(2) 
						 << setw(8) << productPrice[i] << "\n";
			break;
		// display entire inventory list
		case 'B':
		case 'b':
			cout << "\nCurrent Inventory and Prices:\n\n";
			for (int i = 0; i < productNumber.size(); i++)
				cout << "\t" << "Item: " << setprecision(0) << productNumber[i]
					 << "   Price: $" << right << fixed << setprecision(2) 
					 << setw(8) << productPrice[i] << "\n";
			break;
		default:
				cout << "\nInvalid selection.";
	}
	readInFile.close();
	cout << "\n";
	return 0;
}


int fileSort()
{
    ifstream inStream("Inventory.txt");
	assert(inStream.is_open());
	vector<string> inventoryVector;
	string inventoryLine;
	for (;;)
	{
		getline(inStream, inventoryLine);
		if (inStream.eof()) break;
		inventoryVector.push_back(inventoryLine);
	}
	inStream.close();

	sort(inventoryVector.begin(), inventoryVector.end());

	ofstream outStream("InventorySort.txt");
	assert(outStream.is_open());
	for (int i = 0; i < inventoryVector.size(); i++)
		outStream << inventoryVector[i] << endl;
	outStream.close();
	return 0;
}

This is the instream text file "Inventory.txt":

Code:

101      45.00
303        3.00
707    102.00
302      13.45
555        7.97
999    500.00
345      76.99
325        3.33
769      22.45
111        2.76

Once the program ends. A Microsoft Development Environment box pops up and refering to the InventorySort.txt file, says:
"This file has been modified outside of the source editor. Do you want to reload it."

The file has been sorted, it just hasn't been written to the text file - the file is blank unless I say yes. What is happening, why, and how do I fix it?

Thanks for your input. You all have been great!

So it sorts the file but visual studio doesn't refresh it until you tell it to. I don't see the problem.