Program crash after viewing or altering a file

[Hippiewho]

Ok so im trying create an program that asks the user for a few things to keep track of inventory but when i try change or view the items it crashes. i can append to the file at without problem. also i notice that first run with a clean .dat file doesnt cause a crash. so heres my code

//Struct.h
#include <iostream>
#include <string>
using namespace std;
//Item description
//Quantity on hand
//Wholesale cost
//Retail cost
//Date added to inventory

struct DateAdded
{
	int Day;
	string Month;
	int Year;
};
struct Inventory
{
	string ItemDescription;
	int OnHandQuantity;
	double WholeSaleCost;
	double RetailCost;
	DateAdded Date;
};

//********************************************************************************************
//Write a program that uses a structure to store the following inventory information in a file:
//Item description
//Quantity on hand
//Wholesale cost
//Retail cost
//Date added to inventory
//
//The program should have a menu that allows the user to perform the following tasks:
//• Add new records to the file
//• Display any record in the file
//• Change any record in the file
//Input Validation: The program should not accept quantities, or wholesale or retail
//costs less than 0. The program should not accept dates that the programmer determines
//are unreasonable.
//
//*********************************************************************************************

#include <fstream>
#include <iomanip>
#include <iostream>
#include <string>
#include <cstdlib>
#include "Struct.h"
using namespace std;

void Selection1 ();
void Selection2 ();
void Selection3 ();

int main ()
{		
	//Declarations 
	int selection;

	char repeat = 'Y';
	do	
	{	
	system("CLS");
	// Program Startand initail and recurring main menu
	cout << setw(5) << "***************************************************" << endl
		 << setw(5) << "*                      Hello!                     *" << endl
		 << setw(5) << "*   This Program will take the item description,  *" << endl 
		 << setw(5) << "* on hand quantity, Wholesale cost, Retail cost   *" << endl
		 << setw(5) << "* and Date added to inventory of several items    *" << endl
		 << setw(5) << "* and write them to a file.                       *" << endl
		 << setw(5) << "***************************************************" << endl;

	cout << endl << endl ;
	cout << "What do you wish to do?:" << endl
		 << "1. Add new records to the file." << endl
		 << "2. Display a record from file." << endl
		 << "3. Change a record already on file." << endl
		 << "Selection: ";
	cin >> selection;
	
	if (selection == 1) 
		{Selection1();}
	
	else if (selection == 2)
		{Selection2();}

	else if (selection == 3)
		{Selection3();}

	cout << endl << "Would you like to make another selection? (y for yes and n for no)";
	cin  >> repeat;
	}while (toupper(repeat) == 'Y');

return 0;
}

void Selection1()
{
	struct Inventory Item;
	system("CLS");
			// Create and open the file for writing and appending.
			 fstream stuff("stuff.dat", ios::out | ios::app |ios::binary);
				if (!stuff)
					{
					cout << "Error opening file. Program aborting.\n";
					return;
					}
			 //Fills struct Item
			cout << endl;
			cout << "What is the Description of the item? ";
			cin  >> Item.ItemDescription;
			cout << "How many are on hand? ";
			cin  >> Item.OnHandQuantity;
				while(Item.OnHandQuantity<0)
				{
					cout << "Please Input a number greater than 0: ";
					cin >> Item.OnHandQuantity;
				}
			cout << "What is the whole sale cost of this item? ";
			cin  >> Item.WholeSaleCost;
				while(Item.WholeSaleCost<0)
				{
					cout << "Please Input a number greater than 0: ";
					cin >> Item.WholeSaleCost;
				}
			cout << "What is the retail cost of this item? ";
			cin  >> Item.RetailCost;
				while(Item.RetailCost<0)
				{
					cout << "Please Input a number greater than 0: ";
					cin >> Item.RetailCost;
				}
			cout << "Please type in the Date the item was entered" << endl
				 << "(EX. 19 March 1989): ";
			cin >> Item.Date.Day >> Item.Date.Month >> Item.Date.Year;
				
				//Year Validation
				while (Item.Date.Year<2005)
					{cout << "Please enter a valid year (greater than 2005): ";
					 cin  >> Item.Date.Year;}
				while (Item.Date.Year>2012)
					{cout << "Please enter a valid year (less than 2012): ";
					 cin  >> Item.Date.Year;}
				
				//Writes to file
				stuff.write(reinterpret_cast<char *>(&Item),
							sizeof(Item));
				//Closes file
				stuff.close();
}
void Selection2()
{
	system("CLS");
			//Declarations
			int ViewSelection,
				count = 1;
			struct Inventory Item;

			cout << endl << "Choose method of viewing" << endl;
			cout << "1. View All." << endl
				 << "2. Choose a number to view its information." << endl
				 << "Selection: ";
			cin  >> ViewSelection;
			
			// Create and open the file for reading.
			fstream record("stuff.dat", ios::in | ios::binary);
				if (!record)
				{
				 cout << "Error opening file. Program aborting.\n";
				 return;
				}
		if (ViewSelection == 1)
			{
			record.read(reinterpret_cast<char *>(&Item),
					   sizeof(Item));


				while (!record.eof())
				{

				cout << endl << "Record #" << count << endl;
				cout << "Description: "         ;
				cout << Item.ItemDescription << endl;
				cout << "Quantity on hand:    " ;
				cout << Item.OnHandQuantity  << endl;
				cout << "Whole Sale cost: "     ;
				cout << Item.WholeSaleCost   << endl;
				cout << "Retail cost: "         ;
				cout << Item.RetailCost      << endl;
				cout << "Date Added to record: ";
				cout << Item.Date.Day << " "
					 << Item.Date.Month << " "
					 << Item.Date.Year << endl  ;
				record.read(reinterpret_cast<char *>(&Item),
					   sizeof(Item));
				count++;
				}
				cout << endl;
			}
		if (ViewSelection == 2)
			{
				int RecordView;
				//Asks user which record they wish to view
				cout << "which record to you wish to view? ";
				cin  >> RecordView;
			
				//Displays the record
				record.seekg((RecordView-1) * sizeof(Item), ios::beg);
				record.read(reinterpret_cast<char *>(&Item),
					   sizeof(Item));
				cout << endl << "Record #" << (RecordView) << endl;
				cout << "Description: "         ;
				cout << Item.ItemDescription << endl;
				cout << "Quantity on hand:    " ;
				cout << Item.OnHandQuantity  << endl;
				cout << "Whole Sale cost: "     ;
				cout << Item.WholeSaleCost   << endl;
				cout << "Retail cost: "         ;
				cout << Item.RetailCost      << endl;
				cout << "Date Added to record: ";
				cout << Item.Date.Day << " "
					 << Item.Date.Month << " "
					 << Item.Date.Year << endl  ;
				cout << endl;
			}
		record.close();
}
void Selection3()
{
	system("CLS");
			//Declaration
			int RecordView;
			struct Inventory Item;
			//Asks users which record the wish to view and edit
			cout << "Which record do you wish to view and edit? ";
			cin  >> RecordView;

			//Displays the record
			fstream record("stuff.dat", ios::out | ios::in | ios::binary);
			if (!record)
			{
				cout << "Error opening file.";
				return;
			}
			record.seekg((RecordView-1) * sizeof(Item), ios::beg);
			record.read(reinterpret_cast<char *>(&Item),
						sizeof(Item));
				cout << endl << "Record #" << (RecordView) << endl;
				cout << "Description: "         ;
				cout << Item.ItemDescription << endl;
				cout << "Quantity on hand:    " ;
				cout << Item.OnHandQuantity  << endl;
				cout << "Whole Sale cost: "     ;
				cout << Item.WholeSaleCost   << endl;
				cout << "Retail cost: "         ;
				cout << Item.RetailCost      << endl;
				cout << "Date Added to record: ";
				cout << Item.Date.Day << " "
					 << Item.Date.Month << " "
					 << Item.Date.Year << endl  ;

			//Takes input for the new values
				cout << endl;
				cout << "Please enter the new values now." << endl
					 << "Description: ";
				cin  >> Item.ItemDescription ;
				cout << "Quantity on hand: ";
				cin  >> Item.OnHandQuantity ;
				cout << "Whole Sales Cost: ";
				cin  >> Item.WholeSaleCost ;
				cout << "Retail Cost: " ;
				cin  >> Item.RetailCost ;
				cout << "Date added: ";
				cin  >> Item.Date.Day >>
						Item.Date.Month >>
						Item.Date.Year;
				
				//Year Validation
				while (Item.Date.Year<2005)
					{cout << "Please enter a valid year (greater than 2005): ";
					 cin  >> Item.Date.Year;}
				while (Item.Date.Year>2012)
					{cout << "Please enter a valid year (less than 2012): ";
					 cin  >> Item.Date.Year;}
				
				//Writes to record
				record.seekg((RecordView-1)*sizeof(Item), ios::beg);
				record.write(reinterpret_cast<char *>(&Item),
							 sizeof(Item));
				cout << "The record has been edited!" << endl ;
				//record.close();
}

[Moschops]

The problem is in how your writing to and reading from the file. You can't just write out the same number of bytes as the object is. The string, for example, contains things like pointers to other places in memory where the actual name is stored.