2013 Old Spec

Question 4

The algorithm, represented using pseudo-code in Figure 4, and the variable table, Table 3, describe a simple two player game. Player One chooses a whole number between 1 and 10 (inclusive) and then Player Two tries to guess the number chosen by Player One. Player Two gets up to five attempts to guess the number. Player Two wins the game if they correctly guess the number, otherwise Player One wins the game.

Note that in Figure 4, the symbol <> means "is not equal to".

Figure 4

   OUTPUT "Player One enter your chosen number: "

   INPUT NumberToGuess 

   WHILE NumberToGuess < 1 OR NumberToGuess > 10 DO

       OUTPUT "Not a valid choice, please enter another number: "

       INPUT NumberToGuess

   ENDWHILE

   Guess = 0

   NumberOfGuesses = 0

   WHILE Guess <> NumberToGuess AND NumberOfGuesses < 5 DO

       OUTPUT "Player Two have a guess: "

       INPUT Guess

       NumberOfGuesses = NumberOfGuesses + 1

   ENDWHILE

   IF Guess = NumberToGuess 

       THEN OUTPUT "Player Two wins"

       ELSE OUTPUT "Player One wins"

Table 3

Identifier	Data type	Purpose
NumberToGuess	Integer	Stores the number entered by Player One
NumberOfGuesses	Integer	Stores the number of guesses that Player Two has made so far
Guess	Integer	Stores the most recent guess made by Player Two

What you need to do

1. Write a program for the above algorithm.
2. Test the program by conducting the tests Test 1 and Test 2.

Test 1

Test that your program works correctly by conducting the following test:

• Player One enters the number 0
• Player One enters the number 11
• Player One enters the number 5
• Player Two enters a guess of 5

Test 2

Test that your program works correctly by conducting the following test:

• Player One enters the number 6
• Player Two enters guesses of 1, 3, 5, 7, 10