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COMP SCI 11 Chapter 2 PowerPoint Notes-1-Introduction to Programming in C++

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Introduction to Programming in C++ Seventh Edition Chapter 2: Beginning the Problem-Solving Process• Explain the problem-solving process used to create a computer program • Analyze a problem • Complete an IPO chart • Plan an algorithm using pseudocode and flowcharts • Desk-check an algorithm Chapter Objectives An Introduction to Programming with C++, Seventh Edition 2• People solve hundreds of simple problems every day without thinking about how they do it • Understanding the thought process involved can help in solving more complex problems • You can also use a similar process to design a computer solution to a problem (computer program) Problem Solving An Introduction to Programming with C++, Seventh Edition 3• First step in solving a problem: analyze it – Example: paying and mailing a bill • Next, you plan, review, implement, and evaluate the solution • After this, it may be necessary to modify the solution Solving Everyday Problems An Introduction to Programming with C++, Seventh Edition 4Solving Everyday Problems (cont’d.) Figure 2-1 Summary of the analysis and planning steps for the bill paying problem An Introduction to Programming with C++, Seventh Edition 5Solving Everyday Problems (cont’d.) Figure 2-2 Modified algorithm for the bill paying problem An Introduction to Programming with C++, Seventh Edition 6• Solve the following problem: – Steps needed to log on to a school computer • Be sure to use – Items used to accomplish the goal – Algorithm – Goal • Make your solution similar to pages 22 and 23 Solve This Problem An Introduction to Programming with C++, Seventh Edition 7• A similar process to everyday problem solving is used to create computer programs • A computer program is a solution implemented on a computer • There are six steps to creating a computer solution to a problem Creating Computer Solutions to Problems An Introduction to Programming with C++, Seventh Edition 8Creating Computer Solutions to Problems (cont’d.) Figure 2-3 How to create a computer solution to a problem An Introduction to Programming with C++, Seventh Edition 9• It is essential to understand a problem before creating a solution to it • Analyze a problem to: – Determine the goal of solving it (Output) – Determine the items needed to achieve that goal (Input) • Always search first for the output Step 1−Analyzing

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