Solution Source Code

Code Overview

1. Header Files and Namespace:

• <iostream> is included for input and output operations.
• <string> is included for potential future use.
• using namespace std; allows the use of standard functions without prefixing them with std::.

2. User Input Function (ReadPositiveNumber)

• Uses a do-while loop to ensure positive input.
• Prompts the user to enter a valid number.
• Reads and returns the validated floating-point number.

3. Bill Calculation Function (TotalBillAfterServiceAndTax)

• Takes the initial bill as input.
• Applies a 10% service charge:
  • TotalBill=TotalBill × 1.1
• Applies a 16% tax:
  • TotalBill=TotalBill×1.16
• Returns the final bill amount.

4. Program Execution (main())

• Calls ReadPositiveNumber() to get user input for the total bill.
• Calls TotalBillAfterServiceAndTax() to compute the final bill.
• Prints:
  • Initial Total Bill
  • Final Total Bill (After Service and Tax)
• Returns 0 to indicate successful execution.

This structured explanation ensures clarity and ease of understanding.