🏧 ATM System (C++)

A simple ATM simulation system built in C++.
This project demonstrates file handling, login/authentication, and basic banking operations in a console application.

---

About the Project

The ATM System simulates how an Automated Teller Machine works.
Clients can log in with their account number and PIN code, then access a set of banking services such as withdrawing money, depositing funds, and checking account balances.

The project is built for educational purposes, focusing on:

• Practicing C++ fundamentals (structs, enums, vectors).
• Implementing file handling to save and update client data (Bank.txt).
• Designing menu-driven programs in the console.

---

Features

• Login System

  • Account number + PIN authentication.
  • Keeps client information in Bank.txt.

• ATM Services

  • 🔹 Quick Withdraw (fixed amounts: 20, 50, 100, … 1000).
  • 🔹 Normal Withdraw (any multiple of 5).
  • 🔹 Deposit (adds money to account).
  • 🔹 Balance Check (displays current balance).
  • 🔹 Logout (return to login screen).

• Data Persistence

  • All client data is stored in a text file (Bank.txt).
  • Balances are updated after each transaction.

---

Technologies

• Language: C++
• Compiler/IDE: Microsoft Visual Studio 2022
• Concepts Used:
  • Structs
  • Enums
  • Vectors
  • File handling (text files)
  • Menu-driven programming

---