GameMath

import java.util.Scanner;
import java.util.Random;

public class math {

    public static void main(String[] args) {
        Scanner keyboard = new Scanner(System.in);
        System.out.print("Masukkan Nama Anda:");
        String name = keyboard.nextLine();
        System.out.print("Selamat Datang " + name + "! Jawablah Pertanyaan Dengan Benar:");

        Random random = new Random();
        int randomNumber1 =  random.nextInt(19)+1;
        int randomNumber2 =  random.nextInt(19)+1;
        int penjumlahan = randomNumber1 + randomNumber2;
        int Perkalian = randomNumber1 * randomNumber2;
        double pembagian = randomNumber1 / randomNumber2;
        int pengurangan = randomNumber1 - randomNumber2;
        double correct = 0;
        double percentageCorrect = correct * 25;

        System.out.print(randomNumber1 + " + " + randomNumber2 + " = ");
        int Guesspenjumlahan = keyboard.nextInt();
        if (Guesspenjumlahan == randomNumber1 + randomNumber2) {
            System.out.println("Benar!");
            correct++;
        }
            else {
                System.out.println("Salah!");
                System.out.println("Jawaban Yang Benar Adalah = " + penjumlahan);}

        randomNumber1 =  random.nextInt(9)+1;
        randomNumber2 =  random.nextInt(9)+1;
        System.out.print(randomNumber1 + " * " + randomNumber2 + " = ");
        int GuessPerkalian = keyboard.nextInt();
        if (GuessPerkalian == randomNumber1 * randomNumber2) {
            System.out.println("Benar!");
            correct++;
            }
            else{
                System.out.println("Salah!");
                System.out.println("Jawaban Yang Benar Adalah = " + Perkalian);
            }

        randomNumber1 =  random.nextInt(20)+1;
        randomNumber2 =  random.nextInt(9)+1;
        System.out.print(randomNumber1 + " / " + randomNumber2 + " = ");
        double Guesspembagian = keyboard.nextInt();
        if (Guesspembagian == randomNumber1 / randomNumber2) {
            System.out.println("Benar!");
            correct++;
            }
            else{
                System.out.println("Salah!");
                System.out.println("Jawaban Yang Benar Adalah = " + Perkalian);
            }

        randomNumber1 =  random.nextInt(19)+1;
        randomNumber2 =  random.nextInt(19)+1;
         System.out.print(randomNumber1 + " - " + randomNumber2 + " = ");
         int Guesspengurangan = keyboard.nextInt();
         if (Guesspengurangan == randomNumber1 - randomNumber2) {
         System.out.println("Benar!");
                    correct++;
                }
                else{
                    System.out.println("Salah!");
                    System.out.println("Jawaban Yang Benar Adalah = " + pengurangan);
                }
            }
}