JF-LabMethods04.Calculations

import java.util.Scanner;

public class Lab4Calculations {
    public static void main(String[] args) {
        Scanner scanner = new Scanner (System.in);
        String operation = scanner.nextLine();
        int firstNumber = Integer.parseInt(scanner.nextLine());
        int secondNumber = Integer.parseInt(scanner.nextLine());
        switch (operation){
            case"add":
                add(firstNumber,secondNumber);
                break;
            case"multiply":
                multiply(firstNumber,secondNumber);
                break;
            case"subtract":
                subtract(firstNumber,secondNumber);
                break;
            case"divide":
                divide(firstNumber,secondNumber);
                break;
        }

    }

    private static void divide(int a, int b) {
        System.out.println(a / b);
    }

    private static void subtract(int a, int b) {
        System.out.println(a-b);
    }

    private static void multiply(int a, int b) {
        System.out.println(a*b);
    }

    private static void add(int a, int b) {
        System.out.println(a+b);
    }
}

/*
* Write a program that receives a string on the first line ("add", "multiply", "subtract", "divide")
*  and on the next two lines receives two numbers. Create four methods (for each calculation)
* and invoke the right one depending on the command.
* The method should also print the result (needs to be void).*/