为银行项目计算读入/写出的问题

我正在尝试制作一个银行程序，该程序可以从文本文件中读取用户名和密码，并将其与用户输入的内容进行比较。我已经搜索并尝试了几种不同的方法，但似乎无法使其发挥作用。很抱歉，如果这是重新发布的，我就是想不通。我对编码很陌生，所以请原谅我的错误。

我的文本文件名为："Account.txt"第一行包含"username"，第二行包含"userpassword"。

/*
Hunter Walker 11/10/2015
Banking Application with Input validation
Assignment 2
*/
//Headers
#include<iostream>
#include<string>
#include<cstdlib>
#include <fstream>
using namespace std;
//Variables
char input1, input2;
string username,userpassword, newusername, newuserpassword;
string customuser, custompass;
double amountin, amountout;
double total = 0;
//Function declarations
int bankingmenu();
int newaccount();
int login();
int main();
int mainmenu();
int deposit();
int withdraw();
int showbalance();
//Code to read from file

// The main menu for the banking application
int mainmenu()
{
 cout << "Hi! Welcome to Future Computer Programmer ATM Machine!" << endl;
 cout << "Please select an option from the menu below:" << endl;
 cout << "l -> Login " << endl;
 cout << "c -> Create New Account " << endl;
 cout << "q -> Quit " << endl;
 cin >> input1;
 return 0;
}
// Function to allow the user to make a new account
int newaccount()
{
    cout << "**********************************" << endl;
    cout << "Welcome to the create an account menu!" << endl;
    cout << "Please enter your desired username:" << endl;
    cin >> newusername;
    cout << "Please enter a password for your account:" << endl;
    cin >> newuserpassword;
    cout << "Thank you for creating an account with Future Computer Programmer ATM Machine!" << endl;
    cout << "Your username is " << newusername << " and your password is " << newuserpassword << "." << endl;
    cout << endl;
    cout << "Reminder: Don't share your username or password with anyone." << endl;
    cout << endl;
    cout << "**********************************" << endl;
}
// Function to allow user to login to their account
int login()
{
    cout << "Please enter username:" << endl;
    cin >> username;
    cout << "Please enter password:" << endl;
    cin >> userpassword;
    ifstream inputFile;
    inputFile.open("Account.txt");

    cout << customuser << " " << custompass << endl;
    if (customuser == username && custompass == userpassword)
    {
        bankingmenu();
    }
    else
    {
        cout << "User name or password incorrect!" << endl;
        cout << "Returning to main menu!" << endl;
        return main();
    }
    inputFile.close();
    return 0;
}
// The secondary menu for withdrawing/depositing/ or checking balance
int bankingmenu()
{
cout << "*******************************" << endl;
cout << "Please select an option from the menu below::" << endl;
cout << " d -> Deposit Money" << endl;
cout << " w -> Withdraw Money" << endl;
cout << " r -> Request Balance" << endl;
cout << " q -> Quit" << endl;
    cin >> input2;
    if (input2 == 'd')
    {
        deposit();
    }
    else if (input2 == 'w')
    {
        withdraw();
    }
    else if (input2 == 'r')
    {
        showbalance();
    }
    else if (input2 == 'q')
    {
    cout << "Returning to main menu! " << endl;
    return main();
    }
    else
    {
        cout << "Please select a valid input and try again!" << endl;
        return bankingmenu();
    }
    return 0;
 }
// Function to allow to deposit to account
int deposit()
{
   cout << "Please enter the amount of money you wish to deposit:" << endl;
  cin >> amountin;
  total = amountin + total;
  cout << "The deposit was a success! Thanks for using Future Computer Programmer ATM Machine!" << endl;
  return bankingmenu();
}
// Function to allow user to withdraw from account
int withdraw()
{
cout << "Please enter the amount you would like to withdraw:" << endl;
cin >> amountout;
if (total < amountout)
{
cout << "You can't withdraw more money than you have!" << endl;
cout << "Please select a different amount to withdraw." << endl;
return withdraw();
}
else
{
cout << "The amount has been withdrawn." << endl;
total = total - amountout;
return bankingmenu();
}
}
// Function to display the balance
int showbalance()
{
cout << "The balance in your account is $" << total << "." << endl;
return bankingmenu();
}

// The main function that calls all previous functions to run
int main()
{
mainmenu();
// Option to login
if (input1 == 'l')
{
    login();
}
// Option to make a new account
else if (input1 == 'c')
{
    newaccount();
}
// Option to exit program
else if (input1 == 'q')
{
    cout << "Thanks for using the Future Computer Programmer ATM Machine! " << endl;
    cout << "The program will now exit!" << endl;
    return 0;
}
// Input validation
else
{
    cout << "Please select a valid menu option and try again!" << endl;
    return main();
}
return 0;
}