CIS 068 / 2: Lab - Assignment #2: High or Low

Program a simple card game, called "High Or Low":
Assume a deck of 7 cards given, the cards are numbered from 1 to 7. After shuffling, the uppermost card of the deck is presented to the player, who now has to decide, if the next card will be higher or lower in value. if he guessed right, the game is continued, i.e. he again has to guess, if the third card is higher/lower than the second one a.s.o.
The player wins, if there are no more cards left to uncover. He loses, if he precalculated incorrectly.

A typical output of the game would be:

Welcome to High Or Low.
Shuffling...
Uncovered cards: 3 --> (h)igh or (l)ow ? h
uncovered cards: 3 5 --> you were right ! 5 to go. (h)igh or (l)ow ? l
uncovered cards: 3 5 1 --> you were right ! 4 to go. (h)igh or (l)ow ? l
uncovered cards: 3 5 1 2 --> sorry, you were wrong ! You lost this game.
Bye.

Requirements, as developed in the Wednesday class:

• We don't want a graphical user interface, simple console input/output
• The number of cards in the deck is 7, no variable number necessary.
• We discovered 3 objects: the User, the Interface to the user (the game itself, called HighOrLow) and the Deck. So the program will consist of 2 classes:
  • class HighOrLow
  • class Deck

• main
• Constructor --- this one is discussable. Because we don't go for an event driven approach, the games' logic will be put in the main-method, there's no real need for an instance.
• compareDeckToInput --- this one compares the last two uncovered cards to the user's input. the result should be boolean, saying if the user was right or not
• requestInput from user
• exit

class Deck:

• Constructor
• shuffle -- shuffling the deck, algorithm see below
• getNextCard -- uncover next card, return the card's value
• moreCards -- return true, if there are more cards to uncover
• show -- the deck prints out itself, i.e. console-printout of uncovered cards and number of covered cards.

a useful method:(java.io.* must be imported !)

/* requestUserInput
// read keyboard,
// return true if input was 'h'
// return false if input was 'l'
*/

private boolean requestUserInput()
{
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
String line = "";
while (line.length() != 1 || (line.charAt(0) != 'h' && line.charAt(0) != 'l')) {
System.out.print("(h)igh or (l)ow ? ");
try{
line = in.readLine();
}catch(Exception e)
{}
}
return (line.charAt(0) == 'h');
}