CSCI114 week4 Color.pdf

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1、CSCI114/MCS9114Week4LecturesMoreonFunctionsandSelectionStructuresLecturer:JoAbrantesRoom3.212ph:42213872jo_abrantes@uow.edu.auSchoolofComputerScienceandSoftwareEngineeringCSCI114/MCS9114–Spring2011LecturesOverviewRevisionsMoreonFunctions:Parameterspassedby

2、valueControlStructures:TheifstatementTheif-elsestatementCascadedandNestedifTheConditionalExpressionRevisionLastWeek’sProgramTheProblem:Writeaprogramthattakesasinputagivenlengthexpressedinfeetandinches.Itthenconvertsandoutputsthelengthincentimetres.Revis

3、ionProgramDesign:Thealgorithm:1.Prompttheuserfortheinput2.Getthedata(infeetandinches)3.Findthelengthininches4.Outputthelengthininches5.Convertthelengthtocentimetres6.OutputthelengthincentimetresRevisionTheCompleteProgram//ProgramDescription:Convertsagivenleng

4、thfromfeetandinchestocm#includeusingnamespacestd;constdoubleCM_PER_INCH=2.54;constintINCHES_PER_FOOT=12;intmain(){intfeet,inches,totalInches;doublecm;cout<<"Pleaseenterlengthinfeetandinches:";cin>>feet>>inches;totalInches=inches+feet*INCHES_PER_FOOT

5、;cout<<"Thelengthininchesis:"<

6、entsthelogicvalueofanexpression(orsinglevariable)!trueisfalse,!falseistrue!(age<23)isthesameasage>=23SummaryofComplements>isthecomplementof<==!expristhecomplementofexprandvice-versa…RevisionLogicalOperatorsTheothertwooperatorsarebinaryl

7、ogicalandwiththesymbol&&logicalorwiththesymbol

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9、Suchoperationsarebestexplainedusingatruthtable!hashigherprecedenceUnaryoperatorshavethehighestprecedenceRevisionLogicalOperatorsAnd–thevalueofexpr1&&expr2RevisionLogicalOperatorsOr–thevalueofexpr1

10、

11、expr2Lo

12、gicalOperatorsNotethat:!(expr1

13、

14、exptr2)isthesameas!expr1&&!expr2!(expr1&&exptr2)isthesameas!expr1

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16、!expr2RevisionArithmetic,RelationalandLogicalOperatorsMnemonicUnaryArithmeticReallyLogic