This program is a simple cashier system

This program is a **simple cashier system** that allows the user to:

1. **Add Items** – The user can enter the name and price of up to **5 items**.

2. **Display Items** – Shows all the items added to the cart along with their prices and calculates the **total cost**.

3. **Payment** – The user enters the payment amount. The program checks if it covers the total cost and, if valid, calculates the **change**.

4. **Exit** – Closes the system with a thank-you message.

The program uses a **menu-driven approach** with a loop, so the user can keep adding or displaying items until they choose to exit.