Slide 1Slide 2Slide 3Slide 4Slide 5Slide 6Slide 7Slide 8Problem Solving in Greenfoot1/21/2009Opening Discussion●Were you able to get Greenfoot installed on your computer?●What did we talk about last time?●Minute Essays–Difference between object and actor.–Purpose of Greenfoot. Use of programming in the working world. Website creation?–Can the Wombat die?–Will you need Linux?More Minute Essay Comments–Are programming languages still being created in English?–Do you need to memorize every method? Are the numbers for directions always the same?–What is the most complex scenario that can be created in Greenfoot?Algorithms●An algorithm is a systematic description of how to solve a problem. Programming is basically putting algorithms into a language a computer can understand.●You can view the computer as being very simple minded. It only understands simple instructions, not complex ones.●Blowing up a balloon example.Let's Play a Game●Go to the course web site and next to today's lecture you will find a link to a zip file that has three scenarios for today.●Extract the files in your personal space then open the first scenario in Greenfoot.●This is a puzzle game that should be fairly intuitive. Click run and play it some.Steps in the Game●Now I want you to open the second scenario.●For this one you can't use run. Instead, you will move the selector around manually and use a right click on the selector and the world to “play” the game.●What steps do you have to do in order to make the game work?Last Case●Now open the third scenario and try to play the game.●What has changed?●How does this change the steps we wrote down?Minute Essay●Recipes are a standard, yet simple example of something algorithmic that everyone can identify with. What do you see as a significant difference between recipes and what we looked at
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