Mini Calculator

Goal: Develop a mini calculator in C++ that performs various operations such as addition, subtraction, multiplication, and division.
Each function should take two parameters and return the result.
The main function should prompt the user to input two numbers and to choose an operation.
Display a menu of operations for the user to choose from.

Main Program Description

Welcome the user to the mini calculator
Ask the user to enter two numbers and an operation.
If the operation is invalid, the user is forced to enter a valid operation.
Based on the operation entered by the user, the program performs the arithmetic.
The output is then displayed.

Functions for Various Operations

Add Function

Description: This function takes two numbers entered by the user and displays the sum.
Input: Two floating point numbers.
Output: Displays the sum of the two numbers.

Subtract Function

Description: This function takes two numbers entered by the user and displays the difference.
Input: Two floating point numbers
Output: Displays the difference between the two numbers.

Multiply Function

Description: This function takes two numbers entered by the user and displays the product.
Input: Two floating point values
Output: Displays the product between the two numbers.

Divide Function

Description: This function takes two numbers entered by the user and displays the quotient.
Input: Two floating point values
Output: Displays the quotient between the two numbers.