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Program Development Cycle Prof. Carlos Rodríguez Sánchez

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Program Planning (oriented to objects) Analyze Design Choose the interfase Code Test & debug Complete the documentation

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Examples: How fast is a car traveling if it goes 50 miles in 2 hours? Formula: rate = distance / time Rate = 50 miles / 2 hours Rate = 25 mph How much postage to put on the envelope when you mail a letter? Rule = 1 stamp for every 5 sheets of paper or fraction Algorithm: –R–Request the number of sheets –D–Divide by 5 –R–Round the quotient up the next highest whole number

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Algorithm Request the number of sheets of paper; call it SHEETS (input) Divide SHEETS by 5 (processing) Round the quotient up to the next highest whole number; call it STAMPS (processing) Reply with the number STAMPS (output) We can test the algorithm for a letter with 16 sheets of paper.

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Performing a Task on the Computer INPUT PROCESSING OUTPUT

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Programming Flowcharts Representación gráfica de un algorítmo Utiliza símbolos estandarizados

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Flowchart START SHEETS STAMPS = SHEETS / 5 ROUND (STAMPS) STAMPS STOP

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Símbolos Principales

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