ATM Machine Simulator (C Program)

A simple console-based ATM banking system written in C language. Demonstrates basic banking operations with security features like PIN verification and transaction limits.

Features ✅

• PIN Authentication - Default PIN: 1234, maximum 2 wrong attempts
• Secure Login - Card blocked after failed attempts
• Cash Withdrawal - Enter amount and simulate dispensing
• PIN Change - Update your ATM PIN securely
• Transaction Menu - Clean switch-case interface

How to Run

Default PIN: 1234

Sample Output

Code Structure

Technologies

• C Language (stdio.h, string.h)
• Console Input/Output (scanf/printf)
• String Handling (strcmp, strcpy)

Improvements (Future)

• Add balance checking
• Transaction history
• Multiple users
• File-based PIN storage