Select a specific type of horizontal application software to investigate. Visit local computer stores and use the Internet to determine what software packages are available. Describe the common features of those packages and the features that distinguish one product from another.
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Typical horizontal application software for microcomputers includes payroll packages, contact management systems, personal information management packages, and inventory management software. Generic point-of-sale (POS) software also is considered a horizontal application. If students identify two or three examples, have them develop a checklist that shows the common features and unique features (if any) that each package offers.
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Analyze the following code:
``` public class A extends B { } class B { public B(String s) { } }``` a. The program has a compile error because A does not have a default constructor. b. The program has a compile error because the default constructor of A invokes the default constructor of B, but B does not have a default constructor. c. The program would compile fine if you add the following constructor into A: A(String s) { } d. The program would compile fine if you add the following constructor into A: A(String s) { super(s); }
Create an application that models a simple sales terminal. You should be able to sell three kinds of items. Have one button for each item, and attach a picture of the item to the button. Each button should have three labels associated with it. These labels will display the price of the item, the number of that item sold in the current transaction, and a subtotal for that item. Each time a button is pressed, increase the count of that item in the current sale by one and update the subtotal. A separate tenth label should show the total cost of the current sale. An “EndSale” menu item ends the current sale and resets the totals to zero.
What will be an ideal response?
The Excel function, =SUM(B3:B7), will total the values in cells B4, B5, and B6
Indicate whether the statement is true or false.
Where can you go to check for any errors or warnings that your game may produce?
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