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package hoa2mathapp_dela.cruz;
import java.util.Scanner;
import java.util.Random;
/**
 *
 * @author Grade 10
 */
public class HOA2MathApp_DelaCruz {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {

        int v = 0;
        Scanner zz = new Scanner(System.in);
        Random zed= new Random();
        String retry = "YES";
        while (v==0){ //in order to loop infinitely until the user decides to end the program
             if(retry.equals("YES") || retry.equals("Y")){ //checker if it should loop
                 int z = 0;
                 int ta;
                 int in;
        System.out.println("~ WELCOME TO THE MATH CHALLENGE ~");
        System.out.println("TO begin, please select an operator: ");
        System.out.println("||+||-||*||/||");
        char operator = zz.next().charAt(0); //to get the user's chosen operator
        switch (operator){   //switch case for varying operators
           case '+':
            System.out.println("You have selected Addition!");
            while (z < 5){ // counter & limit
                        int r1 = zed.nextInt(15); //to get a random number from 1-50 for r1
                        int r2 = zed.nextInt(15); //to get a random number from 1-50 for r2
                        System.out.println(r1 + " + " + r2);
                        ta = r1 + r2; //computes the correct answer
                        in = zz.nextInt();
                        if (in == ta){ // verifies if user's answer is correct or not
                            System.out.println("You are Correct!");
                            z++; //counter & limit
                        }
                        else {
                            System.out.println("That is the Wrong Answer!");
                            System.out.println("  The Answer is " + ta);
                        }
                    }
                    break;
               // same rules of codes are applied below
                case '-':
                    System.out.println("You have chosen Subtraction!");
                    while (z < 5){
                        int r1 = zed.nextInt(15);
                        int r2 = zed.nextInt(15);
                        System.out.println(r1 + " - " + r2);
                        ta = r1 - r2;
                        in = zz.nextInt();
                        if (in == ta){
                            System.out.println("You are Correct!");
                            z++;
                        }
                        else {
                            System.out.println("That is the Wrong Answer!");
                            System.out.println("  The Answer is " + ta);
                        }
                    }
                    break;

                case '*':
                    System.out.println("You have selected Multiplication!");
                    while (z < 5){
                        int r1 = zed.nextInt(15);
                        int r2 = zed.nextInt(15);
                        System.out.println(r1 + " * " + r2);
                        ta = r1 * r2;
                        in = zz.nextInt();
                        if (in == ta){
                            System.out.println("Correct!");
                            z++;
                        }
                        else {
                            System.out.println("That is the Wrong Answer!");
                            System.out.println("  The Answer is " + ta);
                        }
                    }
                    break;

                case '/':
                    System.out.println("You have chosen Division!");
                    while (z < 5){
                        int r1 = zed.nextInt(15);
                        int r2 = zed.nextInt(15);
                        System.out.println(r1 + " / " + r2);
                        ta = r1 / r2;
                        in = zz.nextInt();
                        if (in == ta){
                            System.out.println("Correct!");
                            z++;
                        }
                        else {
                            System.out.println("Wrong Answer!");
                            System.out.println("  The Answer is " + ta);
                        }
                    }
                    break;

                default :
                    System.out.println("\nPlease input a valid operator!");
            }

            System.out.println("Would you like to try again?");
            System.out.println("YES or NO");
            retry = zz.next().toUpperCase(); //so that the user doesn't have to worry on monitoring wether it's uppercase or not

            }
            else {
                zz.close(); //closes scanner
                break; //breaks loop
                  }
    }
            System.out.println("Thank you come again!");

}
}