C++面向对象程序设计双语教程(第3版)课件 class 1-Introduction.pptx

C++面向对象程序设计双语教程(第3版)课件 class 1-Introduction.pptx

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ObjectivesTounderstandwhatacomputerprogrammingisToknowhowtowriteaprogramTorecognizetwoprogrammingmethodologies

01HowtoWriteaProgram?02TwoProgrammingMethodologies

01HowtoWriteaProgram?

WhatisProgramming?Problem(orTask):Aboutastudent’sgradesRequirements:Astudentlearnstwocoursesatthisterm,thatis,OOP,math.Youneedtoinputtwogradesdisplaytwogradesdisplaymessagescondition:agrade60,displaymessages“youfailedxxx”;otherwise,displaymessage“youpassedxxx”Calculatethesumoftwogradesandaverage,anddisplayresultsCaseStudy1ComputerProgramming–planningorschedulingtheperformanceofataskoraproblem,thatis,itisaprocessthatleadsfromoriginalcomputingproblemtoexecutablecomputerprogram.

HowtoWriteaProgram?Phase1:Problem-solving-planningtheprocessoftask(1)Inputtwogrades;(2)Displaythesetwogrades;(3)Ifoneoftwogradesislessthan60,display“youfailedxxx”,otherwisedisplay“youpassedxxx”(4)Calculatethesumoftwogradesandaverage;(5)Displaytheresults.PseudocodeStep1.Analysisandspecification

HowtoWriteaProgram?Step2.GenerateanalgorithmbyusingaflowchartgradeOfOPP60yesnoinputgradeOfOPP,gradeOfMathoutputsum,averageStartEndgradeOfMath60sum=gradeOfOPP+gradeOfMathoutputgradeOfOPP,gradeOfMathoutput“youpassedOPP”yesnooutput“youfailedOOP”output“youfailedMath”output“youpassedMath”average=sum/2Algorithm:astep-by-stepprocedureforsolvingaproblem.Step3.Verify

HowtoWriteaProgram?Step1.Youmightconsidersomequestionsinthecontextofprogramming.1.WhatdoIhavetoworkwith–thatis,whatismydata?gradeOfOOP,gradeOfMath,sum,average2.Whatdothedataitemslooklike?–datatypes,int,double3.HowwillIknowwhenIhaveprocessedallthedata?–algorithm4.Howmanytimesistheprocessgoingtoberepeated?-structure5.Whatshouldmyoutputlooklike?6.Whatspecia

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