Computer Programming Concepts and Visual Basic David I. Schneider

318 Computer Programming Concepts and Visual Basic
two columns have been filled in, the corresponding average and grade should
be recomputed.
3. Tic-Tac-Toe. Write a program that “officiates” a game of tic-tac-toe. That is, the
program should allow two players to alternate entering X’s and O’s into a tictac-toe
board until either someone wins or a draw is reached. If one of the players
wins, the program should announce the winner immediately; in case of a
draw, the program should display “Cat’s game”. The players should enter their
plays by clicking on the desired cell in the tic-tac-toe grid, and the program
should check that each play is valid. Optional Enhancement: Allow the players
to enter a number n. The program should officiate a best-of-n tournament,
keeping track of the number of games won by each player until one of them
wins more than half of the games. Ignore draws.
4. Hangman. Write a program to play Hangman. (See the following Hangman
form.) A list of 20 words should be placed in a sequential file and one selected
at random with Rnd. The program should do the following:
(a) Draw a gallows on the screen with three line controls.
(b) Create a grid having 1 row and 26 columns, and fill the grid with the 26 letters
of the alphabet.
(c) Create a second grid of one row and the number of columns equal to the
length of the word selected.
(d) Each time the user clicks on one of the letters of the alphabet, that letter
should be removed. If the letter is in the selected word, its location(s) should
be revealed in the second grid. If the letter is not in the word, another piece
of the man should be drawn with a shape control.
5. Inventory Control. Write an inventory program for a book store and save the information
in a sequential file. Each record should consist of five fields—title, author,
category, wholesale price, and number in stock. (The two categories are fiction and
nonfiction.) At any time, the program should display the titles of the books in stock
in a list box, for which the user should have the option of displaying either all titles
or just those in one of the two categories. When a book is selected from the list, its
title, author, category, wholesale price, and number in stock should be displayed in a
picture box. The user should be able to add a new book, delete a book, or change the
inventory level of a book in stock. At any time, the user should be able to calculate
the total value of all books, or the total value of the books in either category.