Question

Develop a menu-driven program that inputs two numbers and, at the user’s option, finds their sum, difference, product, or quotient.

Answer 1

Answer:

import java.util.Scanner;

public class TestClock {

   public static void main(String[] args) {

       Scanner in = new Scanner(System.in);

       System.out.println("Enter num 1");

       double num1 = in.nextDouble();

       System.out.println("Enter num 2");

       double num2 = in.nextDouble();

       System.out.println("enter \"s\" for addition\t \"d\" for difference\t \"p\" for the product\t and \"q\" for the quotient");

       char op = in.next().charAt(0);

       if(op =='s'||op=='S'){

           double sum = num1+num2;

           System.out.println("The sum is "+sum);

       }

       else   if(op =='d'||op=='D'){

           double diff = num1-num2;

           System.out.println("The difference is "+diff);

       }

       else if(op =='p'||op=='P'){

           double prod = num1*num2;

           System.out.println("The product is "+prod);

       }

       else if(op =='q'||op=='Q'){

           double quo = num1/num2;

           System.out.println("The Quotient is "+quo);

       }

   }

}

Explanation:

1. Use Scanner class to receive the two numbers and save in a two variables
2. Create a new variable for Operation (op) to store a character
3. Request the user to enter a character for the opearation (e.g s=sum, p=product, q=quotient and d=difference)
4. Use if/else..if statements to implement the required operation