CHE110-L06 - Programming Concepts Introduction to Visual...

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Department of Chemical Engineering Programming Concepts & Introduction to Visual Basic for Applications CHE110 Introduction to Programming & Problem Solving
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Department of Chemical Engineering Desirable Elements of a Computer Program Well-defined purpose Modular in design Easy to read • Reusable
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Department of Chemical Engineering Structured Programming Top-Down Design Approach – specify “ big picture ” functionality first – continue with sequential refinement of sub-tasks – code-writing is last step Code Structure Types – blocks of code executed once ( sequences ) – conditionally-executed blocks of code ( decisions ) – repeatedly-executed blocks of code ( loops )
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Department of Chemical Engineering Simple Example of Top-Down Design PROGRAM Purpose: Compute the center-of-mass of a collection of objects in two dimensions. x y m ░░░░░ ░░░░░ ░░░░░ x m ,y m y m total x m total M x m M y m = = n y i i i 1 n x i i i 1 n total i i 1 M m x M my m m = = = = = =
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Department of Chemical Engineering Simple Example of Top-Down Design PROGRAM Purpose: Compute the center-of-mass of a collection of objects in two dimensions.
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