雨课堂学堂在线学堂云《Introduction to C++：Problem Solving Using Computational Thinking（南开）》单元测试考核答案

第1题(

)programmingmethodadoptsthethinkingof‘Fromtoptobottom,refinethesolutionprogressively’todecomposelargeprogramsintosmalltasksthatiseasytodealwith.ASoftwareengineeringBSoftwaretestingCStructuredDObject-oriented第2题In(

)programmingmethod,classesareusuallyusedtospecifywhatdatacanbeusedandwhatoperationscanbeperformedonthedata.Datarepresentsthestaticcharacteristicsofanobjectaredefinedasattributes,whileoperationsrepresentthedynamiccharacteristicsofanobjectaredefinedasfunctions.ASoftwareengineeringBSoftwaretestingCStructuredDObject-oriented第3题C++isa(

)programminglanguage.APrimaryBIntermediateCAdvancedDPremium第4题Thediamondintheprogramflowchartrepresents().AJudgmentBEnterCProcessingDProcessflow第5题Whichstatementistrueforprogramflowchart?()ATheflowchartisthefiguredrawnaftertheprogramruns.BFlowchartisadiagramshowingthealgorithmwithspecificgraphicsymbolsandinstructions.CFlowchartisatoolfordescribingalgorithmsinnaturallanguage.DFlowchartissoftware.第6题Whenusingacomputertosolveproblems,firstlyweneedto()AAbstractpracticalproblemsintomathematicalmodels.BDesignthealgorithmtosolvetheproblem.CWriteaprogramtoimplementthealgorithm.DRuntheprogramtosolvetheproblem.第7题Theprocessthattranslatesthealgorithmintolanguagethatthecomputerscanunderstand,aswellasdebugsandteststhecomputerprogramsis(

).ADebuggingaprogramBWritingaprogramtoimplementthealgorithmCCompilingaprogramDRunningaprogram第8题(

)istheprocessandmethodthatcansolveproblemsinalimitednumberofsteps.ALanguageBProcedureCAlgorithmDComputer第9题(

)referstothemethodandprocessofdesigning,compiling,anddebuggingprograms.Itisanactivitytofindalgorithmsandexpresstheminalanguagethatcomputerscanunderstand.ARunningaprogramBCompilingaprogramCDebuggingaprogramDProgramdesigning第10题(

)referstotheprocessofconvertingthedesignedalgorithmintocodethatcouldrunbycomputers.AProgrammingBRunningaprogramCDesigninganalgorithmDDebuggingaprogram第11题TheextensionoftheC++sourcefileis(

).AdllBcppCcDexe第12题C++compilationpreprocessingcommandsincludemacrodefinitioncommands,fileinclusioncommands,andconditionalcompilationcommands,allthesecommandsarestartedwith(

).AB&C#D@第13题AC++projectprogramisusuallycomposedofmultiplefunctions,buttherecanonlybeone(

)function.AreturnBcoutCmainDwhile第14题C++statementsarethebasiccomponentsoffunctions.Allstatementsareendedwitha(

).A.B。C,D;第15题Amongthefollowinguser-definedidentifier,theonlylegaloneis(

).ANo_1BintC30yearsDa*s第16题(

)istheidentifierofthedatainthememoryunit,whichisusedtostoreandaccessthecorrespondingdata.ADatatypeBVariablenameCConstantDObject第17题(

)isusedtosolvetheproblemofnameconflictsofvariables,functionsandclassesinC++.ANamespaceBVariableCFunctionDObject第18题cout<<“Hello!”;isanoutputstatement.Weusecout(readasc-out)tooutputthequotedcharacters,whichindicateastring"Hello!”tothescreen.The()inthisstatementiscalledtheinsertoperator.AcoutB“”C;D<<第19题"endl"isaC++controlcharacterthatrepresents(

).ATostartwithanewlineBToendthepresentlineCToendtheoutputDItsmeaningdiffersaccordingtospecificsituation.第20题"cin>>x>>y;”isaninputstatement,whichusescin(readasc-in)toassignvaluesforvariablesxandywiththevaluesenteredbytheuserthrough().AScreenBMouseCKeyboardDUdisk第21题"return0;"isafunction(

)statementwhichrepresentstheendofafunctioncall.AcallBnormalCabnormalDreturn第22题SinglelineofcommentsinC++programsusesymbols(

),whilemultiplelinesofcommentsusesymbols/*and*/.A//B\C++D–MultipleChoice第23题(Theremaybemorethan1correctanswer)Whicharethemostimportantstepsinfindinganalgorithmforsolvingproblemsusingacomputer?Thealgorithmshouldbeexpressedinsomeform(suchas(

),etc.).ANaturallanguageBFlowchartCC++programDPseudocode正确答案：ABD第24题(Theremaybemorethan1correctanswer)

Computerprogramsmainlyhavethreebasicstructures()ASequentialBBranch(selection)CLoop(Iteration)DInteractive正确答案：ABC第1题Part2Exercise第1题Abytecontains(

)binarybits.A8B16C32

64第2题Thenumeralsystemisamethodtoexpressvaluesbyasetoffixed(

)andasetofunifiedrules.AlanguageBtextCnumberDbyte第3题The(

)ofdigitsusedinanumeralsystemiscalledthebaseofthenumeralsystem.AlocationBnumberCmagnitudeDabsolutevalue第4题Thecorrespondsdecimalnumberofbinarynumber1111.11

is(

).A15.75B13.5C15.5D13.25第5题Thebinarynumbercorrespondingtothedecimalnumber25.25is(

).A11000.01B11000.10C11100.01D11100.10第6题Thehexadecimalnumbercorrespondingtothebinarynumber1011011.011is(

).A5C.7B5C.6C5B.6D5B.7第7题Supposethebinarynumber"01001111"representsanunsignedinteger,(

)isthevalueoftheunsignedintegerA75B76C78D79第8题Assumethatthesignedintegersarerepresentedby8-bittwo’scomplement.Ifx=41andy=107,thenthecomputerstoresX-Yas().A10111110B11000010C01000010

00111110第9题Writeoutthestorageformatof-1.75singleprecisionfloating-pointnumberaccordingtoIEEE754.Theansweris(

).A10111111111000000000000000000000B10111111110000000000000000000000C10111111011000000000000000000000D10111111010000000000000000000000第10题ThedifferencebetweentheASCIIcodesofthecharacter"a"and"A"is(

).A26B56C32D64第11题ThePinyinof"zhong"representsChinesecharactor"中"belongsto(

).AInternalencodingBFontencodingCInternationalencodingDInputencoding第12题Thevectormethodindicatesthatthestringusesa(

)spaceinmemorytostoretheencodingofcharactersorChinesecharacters.AcontinuousBrandom第13题There’re(

)possiblevaluesforlogicaldata.A1B2C10D16第14题Themostsignificantbitofthemantissainanormalizedfloating-pointnumberis1.Thisbittogetherwithotherbitsmustbestored.()

Part3Exercise第1题ThedatatypeidentifierinC++isfloat,andthecorrespondingdatatypeis()。AintegerBlongintegerCsingle-precisionfloating-pointDdouble-precisionfloating-point第2题Constantsaredatathatremainunchangedwhiletheprogramisrunning.Accordingtothewritingform,constantscanbedividedinto()constantsandsymbolicconstants.AintegerBfloat-pointingCcharacterDdirect第3题Theexponentialfloating-pointconstantmusthaveanumberinfrontoftheletterEore,andtheexponentafterEoremustbea().ArealnumberBintegerCnormalizedfloating-pointnumberDcharacter第4题InC++,variableinitializationhastwoforms,usingtheassignmentoperatororusing().AsinglequotesBdoublequotesCsquarebracketsDparentheses第5题InC++,assumethestatement:intm=10,n=5;thentheresultofn/mis().A2B0C0.5DError第6题InC++,assumethestatement:intm=10;doublen=2.5;thentheresultofm%2.5is().A4B0C0.5DError第7题InC++,usetheoperator"=="todeterminewhethertheleftandrightoperandsareequal,andusetheoperator()todeterminewhethertheleftandrightoperandsarenotequal.A<>B!=C><<>D~=第8题Todeterminewhethertheunaryquadraticequationax2+bx+c=0hastwounequalrealroots,therelationalexpressionis().Ab*b-4*a*c>=0Bb*b-4*a*c>0C*b-4*a*c>0&&a!=0Db*b-4*a*c>=0&&a!=0第9题charstr[20]=“NankaiUniversity”;thevalueofsizeof()is().A17B18C19D20第10题Thevalueofsizeof(“NankaiUniversity”)is().A17B18C19D20第11题Thevalueofsizeof(3.14+1)is().A4B8C4.14Dnull第12题

intx=3,y=8;cout<<x<y?x:y;Theoutputonthescreenis().A3B8C11D5第13题

intx=2,y=5,z;cout<<(--x,y-x);Theoutputonthescreenis().A2B3C4D5

多选题第14题Startingwith()

indicatesahexadecimalintegerconstant.A0XB0xC0DU正确答案：AB第15题ThelogicalexpressiontodeterminewhetheracharacterchisanEnglishcharacteris().Ach>='a'&&ch<='z'>='A'&&ch<='z'<>Bch>='a'&&ch<='z'>='A'&&ch<='z'<>Cch>=97&&ch<=122>=65&&ch<=90<>Dch>=97&&ch<=122>=65&&ch<=90<>正确答案：AC第16题ThestatementtypesinC++includedefinition/declarationstatements,input/outputstatements,programflowcontrolstatements,compoundstatements,and(

).AlogicalstatementsBexpressionstatementsCconditionalstatementsDnullstatements正确答案：BD第17题ThedefaultdatatypeofintegerconstantsinC++isint.()第18题Onlyunaryoperators,conditionaloperatorsandassignmentoperatorsarerightassociative,andtherestoftheoperatorsareleftassociative.()第19题InC++,apairofsinglequotesareusedtoencloseacharactertorepresentacharacterliteral.Thesinglequotesaretheseparatorsbetweenthecharacterandotherparts,andalsoarethepartofthecharacter.()第20题InC++,'a'and'A'aredifferentcharacterconstants.()第21题InC++,thelinkmethodisusedtostorestringconstants.Inordertorecognizetheendpositionofthestring,theC++systemwillautomaticallyaddacharacterwithASCIIcode00H(alsocalledNULLcharacteror'\0')astheendmarkofthestring,sothestoragelengthofeachstringisalways1morethanitsactuallength(thenumberofcharacters).()第22题ThelogicalconstantsinC++onlyhavetwovalues:trueandfalse,whichrepresent"logicallytrue"and"logicallyfalse"respectively.()第23题WhenprogramminginC++,whetheritisasymbolicconstantoravariable,youcanuseitdirectlybeforedefiningit.()第24题Avariablenamecorrespondstoanaddressincomputermemory.()第25题Thefollowingstatementdefiningvariables:double

length;width;height;isright.()第26题InC++,usetheoperator"="todeterminewhethertheleftoperandandtherightoperandoftheoperatorareequal.()第27题Theresultoftherelationaloperationislogicallytrueorlogicallyfalse.()第28题Whenperformingmixedoperationsonthedatawithdifferentdatatypes,youmustfirstconvertthetypesofdatatothesametypeandthenperformoperations.C++usestwomethodstoconvertbasicdatatypes:implicitconversion(alsocalledautomaticconversion)andexplicitconversion(alsocalledforcedconversion).()第29题Intheprocessofcalculatingexpressions,thetypesofalloperandsareconvertedintothemostexpressivetypebeforecalculation.()Part3ProgrammingExercise第1题Part4Exercise第1题The

<TestCondition>

inanifstatementcannotbeomitted,andcanonlybeanexpressionoflogicaltype.

(

)第2题Thetestconditionexpressioninanifstatementmustbearelationalexpression.()第3题The

<TestCondition>

inifstatementscanbeomitted.

()第4题The

<TestCondition>

inifstatementscanbeexpressionsofanytype.(

)第5题Thetestconditionexpressioninanifelsestatementcanbeexpressionofanytype.()第6题Fortwo-waybranchingproblems,C++offersifelsestatement,developerscanusethisstatementtowriteprogramstosolveproblemswithcomputers.

第7题Theexecutionprocessofif...elsestatementis:firstcalculatethevalueof<TestCondition>.Ifthevalueistrue,itmeansthatthetestconditionismet,andtheprogramexecutes<BranchStatement1>,otherwiseexecutes<BranchStatement2>.

第8题C++compileralwaysmatcheselsewiththeclosestifbeforeittoformanifelsestructure.()第9题Nestedselectionproblemscanbesolvedusingiforif...elsestatementsprovidedbyC++.()第10题iforif...elsestatementsprovidedbyC++cannotbeuseddirectlyforsolvingmulti-waysbranchingproblemsthroughmultipleconditionaljudgments.()第11题Whendealingwithmulti-waysbranchingproblemswithmanynestedWhendealingwithmulti-waysbranchingproblemswithmanynestedif...elsestatements,itwillnotcausealackofreadabilityandnoteasytocauseerrors.()第12题Thevaluesofeachinaswitchstatementcanbethesame,andshouldbeofthesamedatatypeastheconditionexpression.()第13题Thedefaultbranchinaswitchstatementcannotbeomitted.()第14题Todesignaniterativealgorithm,weshouldfirstdeterminetheoperationorsetofoperationsthatneedtoberepeatedlyperformed,andthendeterminehowmanysuchiterationsneedtobecarriedout.()第15题Bothfor(i=0;;i++)andfor(;;)indicatethatnotoneiterationiscarriedoutatall.()第16题Thetestconditionexpressionofawhilestatementcanbeofanytype.()第17题Regardlessofoverflow,thefollowingstatementwillnotcauseanendlessloop.inti=0;do{++i;}while(i>=0);()第18题inaforstatementisgenerallyusedtoinitializetheloopvariable;isgenerallyusedtocontrolloops;isgenerallyusedtomodifytheloopvariable.()第19题Theinaforstatementwillbeexecutedrepeatedly.()第20题Theinawhilestatementwillbeexecutedatleastonce.()第21题Thereisnodifferencebetweenwhileanddowhilestatements.()第22题Intheorofaloopstatement,theremustbemodificationstotheconditionsothattheexpressioneventuallybecomesfalse.Otherwise,thewillalwaysbetrue,whichwillresultinIntheorofaloopstatement,theremustbemodificationstotheconditionsothattheexpressioneventuallybecomesfalse.Otherwise,thewillalwaysbetrue,whichwillresultintheinabilitytoexittheloop,i.e.,theso-called"endlessloop".()第23题TorealizethenestingofiterativeandbranchalgorithminC++,weTorealizethenestingofiterativeandbranchalgorithminC++,wecanusebranchstatementintheloopbodyofaloopstatement.()第24题Usingjumpstatementscanmakeprogramsmoreconcise,reducethenumberofiterations,andskipthosestatementsthatdonotneedtobeexecutedagain,sothatimprovetheefficiencyofprogramexecution.()第25题breakstatementcanonlybeusedinthethreekindsofloopstatements.()第26题Whenbreakstatementisusedintheinnerloopofmultipleloops,itcanonlyjumpoutofitsinnerloop.()第27题ThefunctionofcontinuestatementistoendthecurrentloopThefunctionofcontinuestatementistoendthecurrentloopaccordingtoacertaincondition,i.e.,theprogramskipsthestatementsthathavenotbeenexecutedintheloopbody,andthenmaketheconditionaljudgmenttodeterminewhethertoexecutethenextloop.()第28题Ifgotostatementisusedwithoutrestriction,itwillcauseconfusioninprogramflow,andreducethereadabilityoftheprogram.()第29题Whenthereturntypeofafunctionisvoid,it'snotnecessarytowriteinthereturnstatement,eventhereturnstatementitselfcouldbeomitted.()第30题Thefunctionofthefollowingprogramistocalculate10!

intn=1,i=1;

while(i<=10);

n=n*i++;

cout<<n;Part4ProgrammingExercise第1题Part5Exercise第1题Whendefininganarray,youcanuseanintegervariabletospecifythelengthofthearray,butthevalueoftheintegervariableisrequiredtobegreaterthan0.()第2题Whenaccessinganelementinanarray,youcanuseanintegervariabletospecifytheindexoftheelementtobeaccessed.()第3题Allelementsinaone-dimensionalarraymusthavethesamedatatype.()第4题Whiledefiningaone-dimensionalarray,youcanusetheinitializationlisttoassigninitialvaluestomultipleelementsinthearray.()第5题Ifaninitializationlistisgivenwhendefiningaone-dimensionalarray,theconstantexpressionusedtospecifythelengthofthearraycanbeomitted.()第6题Given"inta[3];",youcanuse"a[3]=10;"toGiven"inta[3];",youcanuse"a[3]=10;"toassignthethirdelementinthearrayato10.()第7题Aninitializationlistcanonlybeusedwhenanarrayisdefined.()第8题InC++,youcanaccessadouble-typetwo-dimensionalarrayasawhole,forexample,doublea[3][4];cin>>a;()第9题Allelementsinatwo-dimensionalarraymusthavethesamedatatype.()第10题Given“inta[][3]={{1,2,3},{4,5,6}};”,therowlengthofthetwo-dimensionalarrayais2.()第11题Onlytwo-dimensionalarraysprovidedbyC++canbeusedforthestorageoftwo-dimensionaldata.

（）第12题Acharacterarrayisastring.()第13题Thetwodefinitionstatements“charstr[]={'H','e','l','l','o','','w','o','r','l','d','!','\0'};”and“charstr[]="Helloworld!";”arenotequivalent.()第14题Whencalculatingthelengthofastring,theactualnumberofcharactersshallprevail,andtheendidentifier'\0'isnotincluded.()第15题Astringisstoredintheformofarray,anditsinput/outputoperationcanbeperformedasawhole.()第16题Whendefiningastructuretype,allmembersinthestructurecanhavedifferentdatatypes.()第17题Astructuretypedefinitionmustendwithasemicolon.()第18题Aswithothertypesofvariables,youcanassigninitialvaluestoAswithothertypesofvariables,youcanassigninitialvaluestoeachmemberofthestructurevariablewhiledefiningastructurevariable.()第19题Ifamemberofastructurevariableisalsoofastructuretype,youneedtomakemultiplereferencestothemember.()第20题Youcanonlyuseenumconstantstoassignvaluestoenumvariables.()Part5programmingExercise第1题Part6Exercise第1题Onlyfunctioncallswithreturnvaluescanparticipateinotheroperationsasoperands.()第2题Thenumberofpassed-inactualparameterswhencallingafunctioncanbemorethanthenumberofformalparameters.()第3题Whensolvingacomplextaskindailylife,weusuallydecomposethetaskintoseveralsub-tasks,andgraduallycompletethesesub-taskstoachievetheoverallgoalofthetask.()第4题Whenusingcomputerstosolveapracticalproblem,theoriginalproblemisusuallydecomposedintoseveralsub-problemsbasedonthemodularityidea.Aftersolvingeachsub-problemseparately,thesolutionoftheoriginalproblemisobtainedaccordingtothesolutionofeachsub-problem.()第5题Ifthetypeofafunctionisvoid,theremustbenoreturnstatementinthefunctionbody.()第6题Ifafunctionhasnoformalparameters,theformalparameterlistcanbeomittedwhenthefunctionisdefined,thatis,thefunctiondefinition"intfun{…}"iscorrect.()第7题Fortheformalparameterswithdefaultvalues,ifthecorrespondingFortheformalparameterswithdefaultvalues,ifthecorrespondingactualparametersaregivenwhencallingafunction,thevaluesofformalparameterswillalsobeused.()第8题C++allowsthedefaultvaluesofformalparameterstobegiveninC++allowsthedefaultvaluesofformalparameterstobegiveninfunctiondefinitionsordeclarations.Whencallingafunction,ifthecorrespondingactualparametersarenotgiven,thefunctionwillautomaticallyusethedefaultvaluesofformalparameters;ifthecorrespondingactualparametersaregiven,thefunctionwillpreferentiallyusetheincomingactualparametervalues.()第9题Whendefiningafunctionoverloading,theformalparameterlistwiththesamefunctionnamecanalsobeexactlythesame.()第10题Itisnecessarytooverloadthefunctionswhichhavethesimilarfunctions.Overloadingfunctionswithoutcorrelationwillreducethereadabilityoftheprogram.()第11题Acompilationpreprocessingcommandendswithasemicolon.()第12题Whenwritinglarge-scaleprograms,themulti-filestructureisusuallynotused.()第13题Themulti-filestructureofaprogramcanmaketheprogramstructureclearandeasytomanageandsearch.()第14题Thedefinitionsofdatatype,suchasstructure,enumerateddataandsoon,aregenerallyplacedinuser-definedheaderfiles.()第15题Thedefinitionsofglobalvariablesshouldbeputintheheaderfile.()第16题Astaticglobalvariablecanbeaccessedbothinthesourcefilethatdefinesitandinothersourcefiles.()第17题Theformalparametersoffunctionsareglobalvariablesandcanbeaccessedinallfunctionsoftheprogram.()第18题Globalvariablesdefinedinonesourcefilemustbedeclaredexternallybeforebeingusedinothersourcefiles.()第19题Ifalocalvariableisnotinitializedwhenitisdefined,itsvalueisrandom.()第20题Astaticlocalvariablecanonlybeusedinthefunction(orcompoundstatement)thatdefinesit.()第21题Ifastaticlocalvariableisnotinitializedwhenitisdefined,itisautomaticallyinitializedto0.()第22题Theformalparametersoffunctionsarealsoglobalvariables()第23题Globalvariablesarevariablesdefinedinallfunctions.()第24题Theuseofglobalvariableswillreducetheindependencebetweenfunctions,soweshouldtrytoreducetheuseofglobalvariableswhenwritingprograms.()第25题Staticfunctionshavefilescope,thatis,theycanonlybecalledinthesourcefilethatdefinesthem.()第26题Afunctioncanusethereturnstatementtoreturnmultipleresults,suchasthestatement"returna,b;"returnsthevaluesofaandbtothefunctioncallatthesametime.第27题Ifthetypeofafunctionisvoid,theremustbenoreturnstatementinthefunctionbody.

第28题AC++programcancontainoneandonlyonemain()function.Themain()functionistheentryofthewholeprogram,andtheprogramcallotherfunctionsinthemain()function.

第29题Thedefaultparametersvaluesofafunctioncanbespecifiedintwopositions:ifthereisafunctiondeclaration,theyshouldbespecifiedinthefunctiondeclaration;otherwise,itisdirectlyspecifiedinthefunctiondefinition.

第30题

Forcustomfunctions,thedeclarationsofallfunctionsdefinedinasourcefileareusuallyputinacorrespondingheaderfile.第31题

Globalvariablesdefinedinonesourcefilemustbedeclaredexternallybeforebeingusedinothersourcefiles.

第32题Variableswithdifferentscopescanhavethesamename.Thevariableswithsmallerscopesaregivenpriorityaccess.

第33题

Ifastaticlocalvariableisnotinitializedwhenitisdefined,itisautomaticallyinitializedto0.第34题

Theformalparametersoffunctionsarealsoglobalvariables第35题Inaprogramwithamulti-filestructure,externalfunctionsdefinedinasourcefilecanbecalledinothersourcefilesinadditiontothesourcefilethatdefinesthem.

Part6programmingExercise第1题Patr7Exercise第1题Whenaprogramruns,thesystemwillallocatememoryforit.Accordingtothedifferentdatatypesstored,thememorycanbedividedintofoursegments:textsegment,globaldatasegment,heapsegmentandstacksegment.()第2题NULLisaconstantdefinedbythesystem,withavalueof0,indicatinganinvalidmemorywhichisinaccessible.()第3题Apointercanbeaconstantoravariable.()第4题The"*"inthestatement"int*p;"indicatesthatThe"*"inthestatement"int*p;"indicatesthatapointervariableisdefined.()第5题Giventhatpisanintpointervariable,thentheasterisk("*")inthestatement"*p=10;"istheaddress-ofoperator.()第6题

*(<PointerExpression>+i)isequivalentto<PointerExpression>[i].第7题Thestatement"char*s="abc";strcpy(s,"def");"canbeexecutednormally.()第8题Thefunctionofputs()issimilartocout,butwhenusingtheputs()Thefunctionofputs()issimilartocout,butwhenusingtheputs()functi