(30 points) Chapter 5: Programming Project “Guessing game”
a. Create “GuessingGame.java” file.
b. Modify it so that the program plays a number guessing game with the user.
First, the program picks a random integer between 1 and 100 (inclusive), use class constants to set the range. The game
then it accepts guesses from the user until the user guesses the number correctly. After each incorrect guess, the program
will tell the user whether the correct answer is higher or lower than the guess. Once the user types the correct number,
the game ends and the program reports how many guesses were made. An example game is shown below:
I'm thinking of a number between 1 and 100...
Your guess?
50
It's lower.
Your guess?
25
It's higher.
Your guess?
35
It's lower.
Your guess?
30
It's higher.
Your guess?
32
It's lower.
Your guess?
31
You guessed it in 6 guesses!
After each game ends and the number of guesses is shown, the program asks the user if he/she would like to play again.
Assume that the user will type a one-word string as the response to this question. A new game should begin if the user's
response starts with a lower- or upper-case Y. For example, answers such as "y", "Y", "yes", "YES", "Yes", or "yeehaw" all
indicate that the user wants to play again. Any other response means that the user does not want to play again. For
example, responses of "no", "No", "okay", "0", "certainly", and "hello" are all assumed to mean no.
Once the user chooses not to play again, the program prints overall statistics about all games played: the total number
of games, total guesses made in all games, average number of guesses per game (as a real number rounded to the
nearest tenth), and best game (fewest guesses needed to win any one game) are displayed.
Here is an example of the entire (multiple) game play:
I'm thinking of a number between 1 and 100...
Your guess?
50
It's higher.
Your guess?
75
It's lower.
Your guess?
65
It's lower.
Your guess?
64
You guessed it in 4 guesses!
Play again?
YES
I'm thinking of a number between 1 and 100...
Your guess?
37
You guessed it in 1 guesses!
Play again?
y
I'm thinking of a number between 1 and 100...
Your guess?
50
It's lower.
Your guess?
25
It's lower.
Your guess?
13
You guessed it in 3 guesses!
Play again?
no
Your overall results:
Total games = 3
Total guesses = 8
Guesses/game = 2.7
Best game = 1
c. Create a check for correct data type
I’m thinking of a number between 1 and 100…
Your guess?
50.5
Your guess was not a whole number between 1 and 100
Your guess?
I’m thinking of a number between 1 and 100…
Your guess?
Sam
Your guess was not a whole number between 1 and 100
Your guess?
d. Check to make sure the users guess was within the range 1 to 100
I'm thinking of a number between 1 and 100...
Your guess?
101
Your guess was not a whole number between 1 and 100
Your guess?
I'm thinking of a number between 1 and 100...
Your guess?
-1
Your guess was not a whole number between 1 and 100
Your guess?
Read user yes/no answers using the Scanner's next method (not nextLine, which can cause strange bugs when
mixed with nextInt). To test whether the user's response represents yes or no, use String methods seen in Chapters 3-
4 of the book. If you get an InputMismatchException, you are trying to read the wrong type of value from a
Scanner.
For this assignment you are limited to the language features in Chapters 1-5 of the textbook.
Start simple -- I suggest that you begin by writing a simpler version that plays a single guessing game. Ignore other
features such as multiple games and displaying overall statistics. It will be much easier to add those in after you make
the single game work as expected.
Remember, your program will be graded both on “external correctness” and “internal design and style” (whether your
source code follows the style guide).
c. Submit the final “GuessingGame.java” file
Extra Credit---Check to see if the users guess is further away from the target number than their last guess
I'm thinking of a number between 1 and 100...
Your guess?
50
It's lower.
Your guess?
75
It’s lower.
Your guess was further from the target number
70
It's lower.
I'm thinking of a number between 1 and 100...
Your guess?
50
It's higher.
Your guess?
45
It’s higher.
Your guess was further from the target number
