Other Tree Traversals Using the following recursive algorithms, traverse the tree of Figure 9.17.

1. A Guessing Game You are on vacation at home and planning to enjoy your free time. Alas! your parents ask you to take care of your little sister, and she is a real pest. In order not to see your vacation time slowly wasted, you decide to have the computer entertain your little sister. To do this, you want to develop a simple game program that will pick randomly an integer number between 1 and 1,000. The program will ask your little sister to guess that number in a maximum of ten tries, and will produce an appropriate message when the end of the game is reached. Obviously, the program needs to be interactive. It will display a message at the start of the game and prompt your sister for a guess. Each time she makes a guess, it will have to indicate whether the guess was between the limits or was high or low, or detect that the guess was right. At the end of a game, the program will allow your little sister to decide to continue to play or to stop. The input format is simply that of an integer number, or a character for yes or no. The output formats are mostly messages.

Start-of-game message:

Let’s play a guessing game. I pick a number between 0 and 1,000. You have to guess it. But you have only 10 tries to guess my number.

End-of-game messages:

Congratulations! 999 is right. You lose! My number was 999. Do you want another game? (Y/N)

Game messages:

Make a guess: Wait a minute! My number is greater than 0! You wasted a guess! My number is 1,000 or less. Well … your number is too small. Sorry, but your number is too big.

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