/* This program will randomly generate expressions of the form  X  +  Y  =
 *
 * Where X and Y are integers in the interval [0,100)
 *
 * The expression will be presented to the user and the user will have give an answer.
 * The program will determine if the answer is correct or incorrect.
 * The program will repeat as long as the user wants to.
 *
 * @author Anthony Larrain
 */

import javax.swing.JOptionPane;
class AdditionTest{
	public static void main(String [] args){
		int correct = 0, incorrect = 0;
		int response = JOptionPane.showConfirmDialog( null,
			                   "Ready To Test You Arithmetic? ",
			                   "Confirmation",
			                   JOptionPane.YES_NO_OPTION);

		while(response == JOptionPane.YES_OPTION){
			int operand1 = (int)(Math.random() * 100);
			int operand2 = (int)(Math.random() * 100);
			int sum      = operand1 + operand2;

			String display = operand1 + " + " + operand2 + " = ";
			String input =  JOptionPane.showInputDialog(display);

			if(input == null || input.length() == 0){
				System.out.println("Invalid input");
			}
			else{
				int answer = Integer.parseInt(input);
				if(answer == sum){
					System.out.println("Correct!  :)");
					++correct;
				}else{
					System.out.println("Incorrect! :(");
					++incorrect;
				}
				System.out.println(display + sum);
			}
			response = JOptionPane.showConfirmDialog( null,
			                   "Try Another Computation ? ",
			                   "Ready To Test You Arithmetic?",
			                   JOptionPane.YES_NO_OPTION);
		}
		System.out.println("Correct ->   " + correct + "\nIncorrect -> " + incorrect);
		System.exit(0);
	}
}