Question

Write the class Calculator including: a function called addthat takes two parameters containing double values and returns their sum a function called subtractthat takes two parameters containing double values and returns their difference (subtract the second from the first) a function called multiply that takes two parameters containing double values and returns their product a function called divide that takes two parameters containing double values and returns the value of the first divided by the second. If the second number is a zero, do not divide, and return "You can't divide by zero!"

Answer 1

Answer:

public class Calculator {

       public double add(int a, int b){

       return a+b;

   }

   public double substract(int a, int b){

       return a-b;

   }

   public double multiply(int a, int b){

       return a*b;

   }

   public double divide(int a, int b){

       if(b>0){

           return a/b;

       }

       else{

           System.out.println("Cannot divide by zero");

       }

       return -1;

   }    

}

Explanation:

• Using Java Programming Language, the class Calculator is created. There are no fields (Instance variables) and no constructors since these are not required by the question.
• Four methods (functions) are created:  add, substract, multiply and divide as specified in the question.
• Note the use of the if statement in the divide() to handle case of illegal division (by 0)