Download An Introduction to Programming Using Alice 2.2 by Charles W. Herbert PDF

By Charles W. Herbert

AN creation TO PROGRAMMING utilizing ALICE 2.2, moment version, offers scholars with a superb creation to ideas of programming, good judgment, and comparable arithmetic by using Alice, a confirmed instrument for motivating starting programmers. This new version has been absolutely up to date to exploit the hot motion picture making, digital fact, and gaming functions of Alice 2.2. All chapters are supported with powerful workout units and visible diagrams.

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Example text

Top-Down Design and Modular Development Object-oriented programming, by its very nature, encourages the development of reusable code. Objects created for one project can be reused as needed for other projects. Figure 2-3 shows a portion of the methods tab for the iceSkater from the lakeSkater world seen in Chapter 1. Methods to perform simple tasks, such as s p i n , b l i n k E y e s , and jump, are reused as necessary to form the overall routine in this Alice world. The entire skater object can be reused in other worlds where different routines might be assembled from these simple methods.

The Pointer tool is already selected, so experiment a bit by using the pointer to click the bunny and move it around the screen. Notice that you can move the bunny on the ground with the pointer, but you cannot use the pointer to turn the bunny, rotate it, or move it up and down. 2 . Click the Rotate tool and try turning the bunny a few times. You may be tempted to use the other tools, but please wait—for now they'll only confuse things. You can come back and experiment with them after you've finished this chapter.

1. Click File on the menu bar, and then click Exit. The Alice program will close. 2. Reopen the Alice software. Click the Recent Worlds tab in the Welcome to Alice! dialog box, and then open the hello world world that you created. If the name of a world you want to open does not appear on the Recent Worlds tab, you can click the Open a world tab and look for your world in the tree of folders. TUTORIAL 1D—PRINTING CODE FROM AN ALICE WORLD The code from methods and events in an Alice world can be saved on an HTML Web page, which you may then print, send as an e-mail attachment, or view like any other Web page.

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