Guess the Number game.

guess-the-number.php

#!/usr/bin/php -q
<?php 

/*

Problem Solving and Programming Concepts
 
Adam Merrifield (2697795).
 
Guess the Numbers

NOTE: I'm not much for this pseudo code so I chose to write it as a
		real program first and then convert it to pseudo code.

PSEUDO CODE

start
	DECLARATIONS
		randomNumber = rand(1, 1000)
		msgGuess = "Guess a number between 1 and 1000: "
		msgPlay = "Would you like to play again? (Y or N): "
		userInput
		userChoice
		succeed = 0
		playAgain = "Y"

	while (playAgain == "Y")
		while (succeed == 0) {
			userInput = prompt(msgGuess)
			succeed = compareNums(userInput, randomNumber)
		endwhile
		userChoice = prompt(msgPlay)
		playAgain = newGame(userChoice)
	endwhile

stop

prompt(message = null) {
	output message
	input = STDIN
return

compareNums(input, answer)
	if input is a number
		if input == answer
			output "You guessed the number!"
			succeed = 1
		else
			if input > answer
				output "Too high. Try again."
			else
				output "Too low. Try again."
			endif

			succeed = 0
		endif
	else
		output "==> input ...is not a number. Try again."
		succeed = 0
	endif
	
return

newGame(input)
	if input == "Y"
		playAgain == "Y"
	else
		output "Thanks for playing!"
		playAgain == "N"
	endif
return


*/

/**
 * Actual running program
 */

$randomNumber = rand(1, 1000);
$msgGuess = "Guess a number between 1 and 1000: ";
$msgPlay = "Would you like to play again? (Y or N): ";
$userInput;
$userChoice;
$succeed = 0;
$playAgain = "Y";

while ($playAgain == "Y") {
	while ($succeed == 0) {
		$userInput = prompt($msgGuess);
		$succeed = compareNums($userInput, $randomNumber);
	}
	$userChoice = prompt($msgPlay);
	$playAgain = newGame($userChoice);
}

function prompt($message = null) {
	fwrite(STDOUT, $message);
	$input = trim(fgets(STDIN));
	return $input;
}

function compareNums($input, $answer)
{
	if (ctype_digit($input)) {
		if ($input == $answer) {
			echo "You guessed the number!\n";
			$succeed = 1;
		} else {
			if ($input > $answer) {
				echo "Too high. Try again.\n";
			} else {
				echo "Too low. Try again.\n";
			}
			$succeed = 0;
		}
	} else {
		echo "\n==> $input ...is not a number. Try again.\n";
		$succeed = 0;
	}
	

	return $succeed;
}

function newGame($input)
{
	if ($input == "Y" || $input == "y") {
		$playAgain = "Y";
	} else {
		$playAgain = "N";
		echo "Thanks for playing!";
	}
	return $playAgain;
}