CodeAlpha Login & Registration System

A C++ console-based Login and Registration System developed as part of the CodeAlpha C++ Programming Internship.

Features

• User registration
• Username validation
• Duplicate username detection
• Password validation
• File-based user credential storage
• User login authentication
• Invalid login detection
• Main menu with Register, Login, and Exit options
• Input validation and error messages

How It Works

Registration

The user provides:

1. Username
2. Password

The system checks whether the username already exists. If it is available, the credentials are stored in users.txt.

Login

The user enters:

1. Username
2. Password

The system reads the stored credentials from users.txt and verifies the entered information.

File Storage

User credentials are stored in:

users.txt