ATM machine program help...

[njleos3]

I need some help with my atm program. I don't remember how to inFile. I need to use that so that the users who log in are saved onto the program for future use. The program opens but when I select an option, it gives me an error saying "value2" is being used without being initialized. If there are anymore errors, could you please point them out.

 #include <iostream>
#include <fstream>
using namespace std;

int main()

{
	cout << "       ///    /// //////// ///     //////// //////// ///    /// ////////\n";
	cout << "      ///    /// ///      ///     ///      ///  /// ////////// ///\n";
  	cout << "     /// // /// ///////  ///     ///      ///  /// /// // /// ////////\n";
	cout << "    ////////// ///      ///     ///      ///  /// ///    /// ///\n"; 
	cout << "     /// ///  //////// /////// //////// //////// ///    /// ////////\n";
	cout << "                            //////// ////////\n";
	cout << "                              ///   ///  ///\n";
	cout << "                             ///   ///  ///\n";
	cout << "                            ///   ///  ///\n";
	cout << "                           ///   ////////\n";
	cout << "                       ////////\n";
	cout << "                      ///        ///      ///\n";
	cout << "                     ///      //////// ////////\n";
	cout << "                    ///        ///       ///\n";
	cout << "                   ////////\n";
	cout << "               ///////     ///    ///   /// ///  ///\n";
	cout << "              ///   /// ///  /// ///// /// /// ///\n";
	cout << "             ////////  //////// /// ///// /////\n";
	cout << "            ///   /// ///  /// ///   /// /// ///\n";
	cout << "           ///////   ///  /// ///   /// ///  ///\n";

	
	
	int deposit(int, int);
	int withdraw(int, int);
	string Fname, Lname;
	int choice=0;
	int value1, value2, total;
	 

	do
	{
		cout << "\n\n";
		cout << "\t\t 1. Deposit\n";
		cout << "\t\t 2. Withdraw\n";
		cout << "\t\t 3. Exit\n\n";
		cout << "\t\t    What would you like to do?: \n";
		cin >> choice;


		if(choice == 1)
		{
			cout << "How much money would you like to deposit?\n";
			cin >> value1;
			total = deposit (value1, value2);
		}
        if(choice == 2)
	    {
		    cout << "How much money would you like to withdraw?\n";
			cin >> value2;
			total = withdraw(value1,value2);
        }	
		
		else if(choice == 3)
		{
			//User exits menu
		}
		else
		{
			cout << "Please enter a valid option\n";
		}
		if(choice >0 && choice <3)
		{
			cout << "You have $" << total << " left in your bank account...\n";
		}
	}while(choice != -1); 
      
	system("pause");
	return 0;
}
	int deposit(int num1, int num2)
		{
			return (500 + num1);
		}
	int withdraw(int num1, int num2)
		{
			return(500 - num2);
		}