dap

/*
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 */
package hoa2mathapp_echaure;

import java.util.Scanner;
import java.util.Random;
public class HOA2MathApp_Echaure {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Scanner myObj = new Scanner(System.in);
        char operator = myObj.next().charAt(0);

        int i = 0, a, user;
        Random rand = new Random();

        while (i < 1) {
        System.out.println("~~~~~Welcome to Math Challenge!~~~~~\n");
        System.out.println("   To Start Please Choose The Operator That You Like");
        System.out.println("   | + | | - | | * | | / |");

            switch (operator){
                case '+':
                    System.out.println("Yoou have chosen Addition!");
                    while (i < 5){
                        int r1 = rand.nextInt(50);
                        int r2 = rand.nextInt(50);
                        System.out.println(r1 + " + " + r2);
                        a = r1 + r2;
                        user = myObj.nextInt();
                        if (user == a){
                            System.out.println("Correct!");
                            i++;
                        }
                        else {
                            System.out.println("Wrong Answer!");
                            System.out.println("  The Answer is " + a);
                        }
                    }
                    break;
                case '-':
                    System.out.println("You have chosen Subtraction!");
                    while (i < 5){
                        int r1 = rand.nextInt(50);
                        int r2 = rand.nextInt(50);
                        System.out.println(r1 + " - " + r2);
                        a = r1 - r2;
                        user = myObj.nextInt();
                        if (user == a){
                            System.out.println("Correct!");
                            i++;
                        }
                        else {
                            System.out.println("Wrong Answer!");
                            System.out.println("  The Answer is " + a);
                        }
                    }
                    break;
                case '*':
                    System.out.println("You have chosen Multiplication!");
                    while (i < 5){
                        int r1 = rand.nextInt(50);
                        int r2 = rand.nextInt(50);
                        System.out.println(r1 + " * " + r2);
                        a = r1 * r2;
                        user = myObj.nextInt();
                        if (user == a){
                            System.out.println("Correct!");
                            i++;
                        }
                        else {
                            System.out.println("Wrong Answer!");
                            System.out.println("  The Answer is " + a);
                        }
                    }
                    break;
                case '/':
                    System.out.println("You have chosen Division!");
                    while (i < 5){
                        int r1 = rand.nextInt(50);
                        int r2 = rand.nextInt(50);
                        System.out.println(r1 + " / " + r2);
                        a = r1 / r2;
                        user = myObj.nextInt();
                        if (user == a){
                            System.out.println("Correct!");
                            i++;
                        }
                        else {
                            System.out.println("Wrong Answer!");
                            System.out.println("  The Answer is " + a);
                        }
                    }
                    break;
                default :
                    System.out.println("\nPlease input a valid operator!");
            }
            System.out.println("Would you like to try again with a different operator?");
            System.out.println("Press 1 for YES and 2 for NO");
            char reply;
            c = myObj.nextInt();
            if (c == 2){
                i++;
            }
            else {
                return;
            }
        }

    }

}