import java.util.Random;

import java.io.IOException;

/**

* 1. Use Random to generate a integer from 0 to 25, both inclusively.

* 2. Repeatedly ask the user to guess the integer by entering a letter from a to z.

* 3. Compare the user entered letter with the random integer, the offset by lowercase letter a(0-25),

* output message if user guess right or wrong, low or high.

*/

public class Guess{

public static void main(String[] args){

Random random = new Random();

int number = random.nextInt(26);

number += 'a';

System.out.println("Please Guess the hidden number in the black box, using lowercase letter a-z representing 0-25:");

int userGuess = -1;

do{

try{

userGuess = System.in.read();

}catch(IOException ioe){

ioe.printStackTrace();

System.out.println("Error, try again.");

continue;

}

if(userGuess == '\r' || userGuess == '\n'){

continue;

}

if(userGuess > number){

System.out.println("Too high, guess again:");

}else if( userGuess < number){

System.out.println("Too low, guess again:");

}

}while(userGuess != number );

System.out.println("Congratulations, you are right :) The number in the box is: " + (userGuess - 'a'));

}

}