Calculadora en java

Calculadora o Rekenmachine

En este documento se mostrará una clase llamada calculadora que llama otras clases para utilizar su métodos y otras clases que hacen las mismas funciones de manera individual.

Código de calculadora para llamar 4 operaciones

import java.util.*;

public class Rekenmachine

{

    static Scanner Key  = new Scanner (System.in);

    public  static void main (String[]args)

    {

        System.out.println("What operation do you want?");

        String Operation = Key.nextLine();

     switch (Operation)

     {

         case "Addition":

         Addition request1 = new Addition();

         request1.AdditionOfNumbers();

         break;

         case "Subtraction":

         Subtraction request2 = new Subtraction();

         request2.SubtractionOfNumbers();

         break;

         case "Multiplication":

         Multiplication request3 = new Multiplication();

         request3.MultiplicationOfNumbers();

         break;

         case "Division":

         Division request4 = new Division();

         request4.DivisionOfNumbers();

         break;

        }

    }

}

Operación Suma dependiente de calculadora

import java.util.Scanner;

class Addition

{

void AdditionOfNumbers ()

{

    Scanner input = new Scanner (System.in);

    int FirstNum=0, SecondNum=0;

    int addition;

    System.out.println("Enter First Number:");

    FirstNum = input.nextInt();

    System.out.println("Enter Second Number:");

    SecondNum = input.nextInt();

    addition = FirstNum + SecondNum;

    System.out.println("addition of" + FirstNum + "+" +SecondNum+ "=" + addition);

}

}

Operación Resta dependiente de calculadora

import java.util.Scanner;

class Subtraction

{

void SubtractionOfNumbers ()

{

    Scanner input = new Scanner (System.in);

    int FirstNum=0, SecondNum=0;

    int subtraction;

    System.out.println("Enter First Number:");

    FirstNum = input.nextInt();

    System.out.println("Enter Second Number:");

    SecondNum = input.nextInt();

    subtraction = FirstNum - SecondNum;

    System.out.println("subtraction of" + FirstNum + "-" +SecondNum+ "=" + subtraction);

}

}

Operación Multiplicación dependiente de calculadora

import java.util.Scanner;

class Multiplication

{

void MultiplicationOfNumbers ()

{

    Scanner input = new Scanner (System.in);

    int FirstNum=0, SecondNum=0;

    int multiplication;

    System.out.println("Enter First Number:");

    FirstNum = input.nextInt();

    System.out.println("Enter Second Number:");

    SecondNum = input.nextInt();

    multiplication = FirstNum * SecondNum;

    System.out.println("multiplication of" + FirstNum + "*" +SecondNum+ "=" + multiplication);

}

}

Operación Division dependiente de calculadora

import java.util.Scanner;

class Division

{

void DivisionOfNumbers ()

{

    Scanner input = new Scanner (System.in);

    double FirstNum=0, SecondNum=0;

    double division;

    System.out.println("Enter First Number:");

    FirstNum = input.nextInt();

    System.out.println("Enter Second Number:");

    SecondNum = input.nextInt();

    division = FirstNum / SecondNum;

...