Pre Soňu

package com.jurajmlich;

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        // vypíš
        System.out.println("Welcome to my calculator");

        // premenná, ktorá určite či sa kód vo while má opakovať (ak je true, tak áno, ak je false, tak nie)
        Boolean shouldContinueAsking = true;
        while (shouldContinueAsking) {
            System.out.println("State your username");
            // čítaj a ulož do premennej to, čo užívateľ napíše
            String username = scanner.next();
            System.out.println("Insert your password");
            String password = scanner.next();

            // ak je meno a heslo správne...
            if (username.equals("sona") && password.equals("sona123")) {
                // tak sa prestaň pýtať a pokračuj v mojom programe nižšie
                shouldContinueAsking = false;
            } else {
                // ak nie je, vypíš chybovú hlášku (a nijako nezmeň či sa má pokračovať pýtať --> opýta sa teda znovu)
                System.out.println("Username or password incorrect, try again");
            }
        }

        // kalkulačka sa bude pýtať donekonečna
        while (true) {
            System.out.println("Insert the first number");
            Double firstNumber = scanner.nextDouble();
            System.out.println("Insert the second number");
            Double secondNumber = scanner.nextDouble();
            System.out.println("Decide which operation you would like me to do. Write the words multiply or divide or add or subtract.. ");

            // premenná - zadal užívateľ správnu operáciu?
            Boolean correct = false;
            // kým nezadal správnu operáciu, pýtaj sa ho
            while (!correct) {
                String operation = scanner.next();
                if (operation.equals("multiply")) {
                    Double multiplication = firstNumber * secondNumber;
                    System.out.println(multiplication);
                    correct = true;
                } else if (operation.equals("divide")) {
                    Double division = firstNumber / secondNumber;
                    System.out.println(division);
                    correct = true;
                } else if (operation.equals("add")) {
                    Double addition = firstNumber + secondNumber;
                    System.out.println(addition);
                    correct = true;
                } else if (operation.equals("subtract")) {
                    Double subtraction = firstNumber - secondNumber;
                    System.out.println(subtraction);
                    correct = true;
                } else {
                    System.out.println("You dumb piece of shit");
                    correct = false;
                    System.out.println("Try again");
                }
            }
            System.out.println("Proceed to the next operation");

        }







        /*
        // write out a message
        System.out.println("sonicka sa uz trapi");


        // read from console
        Integer firstNumber = scanner.nextInt();
        Integer secondNumber = scanner.nextInt();
        Integer result = firstNumber * secondNumber;
        String xenon = "ahoj Juri";

        if (firstNumber > 10) {
            System.out.println("the number is bigger than 10");
        }

        // write the result of 89 + 57
        System.out.println(result);
        System.out.println(xenon);

        */

    }
}