/******************************************************************
 * Program: MenuCalculator
 *
 * Programmer: Tyler Johnson
 *
 * Due Date: N/A

 *
 * COMP 110-001        Instructor: Tyler Johnson
 *
 * Description: This program asks the user to input two floating-point
 *				numbers.  It then allows the user to perform one of four
 *				operations on the numbers selected by the user.
 *  
 *				Options: Add the two numbers, subtract the two numbers,
 *						 multiply the two numbers, divide the two numbers
 *
 * Input: Two floating point numbers and an option
 *
 * Output: The result of performing the selected option on the two numbers
 *
 ******************************************************************/

import java.util.Scanner;

public class MenuCalculator  {
	
	public static void main(String[] args)  {
	
		double a = 0, b = 0;
		
		Scanner keyboard = new Scanner(System.in);

		//Ask user to input two numbers		
		System.out.println("Hello.  Please enter two numbers on a line separated by a space.");
		
		a = keyboard.nextDouble();
		b = keyboard.nextDouble();
	
		//Provide the user with a list of the options
		
		System.out.println("Thank you. Please select one of these options");
		System.out.println("1 - Add the two numbers");
		System.out.println("2 - Subtract the two numbers");
		System.out.println("3 - Multiply the two numbers");
		System.out.println("4 - Divide the two numbers");
		System.out.print("Option: ");
		
		int option;
		
		option = keyboard.nextInt();
		
		//Perform the operation selected by the user
		//Output the result
		
		System.out.print("The result is: ");
		
		switch(option)  {
		
			case 1:
				System.out.println(a+b);
				break;
			case 2:
				System.out.println(a-b);
				break;
			case 3:
				System.out.println(a*b);
				break;
			case 4:
				System.out.println(a/b);
				break;
			default:
				System.out.println("Error - Invalid Input");
				break;
		}
	}
}