Top Down Design and Decomposition in Karel

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Purpose of Functions

Back

Functions break down problems into smaller parts, making programs more readable.

Front

Guidelines for Using Functions

Back

1. Accomplishes a specific task. 2. Task is used more than once. 3. Solves a smaller problem within a larger one.

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Top-down Design and Decomposition

Back

Involves breaking down a large, complex problem into smaller, manageable parts.

Front

Consider the big picture when writing a program. Break down the problem into smaller chunks.

Back

Start by defining the overall goal, then break it down into steps and subproblems until you have definite tasks.

Front

Making a movie as an analogy for problem-solving.

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The process involves breaking down a large problem (making a feature-length movie) into smaller tasks like writing a script, assembling a cast and crew, filming, and editing.

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Hurdle Karel's big goal

Back

Karel needs to go down the street, jump over every hurdle, and stop at the end.

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First smaller goal for Karel

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Karel needs to go down the street until the end.

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Second smaller goal for Karel

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When Karel meets a hurdle, Karel needs to jump over it.

Front

Third smaller goal for Karel

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After the last hurdle, Karel needs to go to the end of the street.

Front

Task to accomplish in functions

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Karel should go to the next hurdle.