用C++解决问题第十版Chapter 10.docx
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用C++解决问题第十版Chapter10
TRUE/FALSE
1.Astructvariableisdeclareddifferentlyfromapredefinedtypesuchasanint.
ANSWER:
FALSE
2.Twodifferentstructuredefinitionsmayhavethesamemembernames.
ANSWER:
TRUE.
3.Astructurecanonlybepassedtoafunctionasacall-by-valueparameter
ANSWER:
FALSE
4.Afunctionmayreturnastructure.
ANSWER:
TRUE
5.Differentclassmaynothavememberfunctionswiththesamename.
ANSWER:
FALSE
6.Aclassmemberfunctionmaybeprivate.
ANSWER:
TRUE
7.Classdatamembersarealmostalwayspublic.
ANSWER:
FALSE
8.Itispossibletohavemultipleprivatelabelsinaclassdefinition.
ANSWER:
TRUE
9.Theassignmentoperatormaynotbeusedwithobjectsofaclass.
ANSWER:
FALSE
10.Allconstructorsforaclassmustbeprivate.
ANSWER:
FALSE
11.Aderivedclassismorespecificthanitsparent,orbaseclass.
ANSWER:
TRUE
ShortAnswer
1.Thekeyword________definesastructuretypedefinition.
ANSWER:
struct
2.Astructuredefinitionendswiththeclosingbraceanda_________.
ANSWER:
semicolon
3.Astructurevariableisacollectionofsmallervaluescalled____________values
ANSWER:
member
4.Whenastructurecontainsanotherstructurevariableasoneofitsmembers,itisknownasa___________________.
ANSWER:
hierarchicalstructure
5.Whenseveralitems（variablesorvariablesandfunctions）aregroupedtogetherintoasinglepackage,thatisknownas______________.
ANSWER:
（data）encapsulation
6.Thedoublecolon（:
:
）isknownasthe__________operator.
ANSWER:
scoperesolutionoperator
7.Whocanaccessprivatemembersinaclass?
ANSWER:
onlyothermembersoftheclass
8.Amemberfunctionthatallowstheuseroftheclasstofindoutthevalueofaprivatedatatypeiscalleda___________________.
ANSWER:
accessorfunction.
9.Amemberfunctionthatallowstheuseroftheclasstochangethevalueofaprivatedatatypeiscalleda____________________.
ANSWER:
mutatorfunction.
10.Ifyouhaveaclasswithamemberfunctioncalleddisplay（ostream&out）,thatwillsendthevaluesintheclasstotheparameterstream,andyouneedtocallthatfunctionfromwithinanothermemberfunction,howwouldyoucallittoprintthedatatothescreen?
___________________________
ANSWER:
display（cout）;
11.Whatcanaconstructorreturn?
_______________
ANSWER:
nothing
12.Thenameofaconstructoris_____________
ANSWER:
thenameoftheclass
13.Theconstructorofaclassthatdoesnothaveanyparametersiscalleda__________constructor.
ANSWER:
default
14.Inthefollowingclassconstructordefinition,thepartoftheheaderstartingwithasinglecoloniscalledthe________________.
BankAccount:
:
BankAccount（）:
balance（0）,interest（0.0）
ANSWER:
initializationsection
15.Aclassinwhichmodificationstotheimplementationappeartobeinvisibletotheuseroftheclassisknownas_________________.
ANSWER:
anAbstractDataType（ADT）
16.Amemberfunctionthatgetscalledautomaticallywhenanobjectoftheclassisdeclarediscalleda_______________.
ANSWER:
constructor
17.IfclassAisderivedfromclassB,thenBisa_______ofA.
ANSWER:
parent
18.C++11allowsyoutodirectlysetthemembervariablestoinitialvaluesinthedefinitionoftheclass.Thisfeatureiscalled__________________.
ANSWER:
memberinitializers
19.C++11allowsyoutohaveaconstructorcallanotherconstructor.Thisfeatureiscalled_________________________.
ANSWER:
constructordelegation
MultipleChoice
1.Inastructuredefinition,theidentifiersdeclaredinthebracesarecalled
a.classes
b.structs
c.membernames
d.variables
ANSWER:
C
2.Youspecifyanindividualmemberofastructbyusing
a.theassignmentoperator
b.anampersand
c.anunderscore
d.Thedotoperator
ANSWER:
D
3.Toassignvaluestoastructurevariable,youusethe
a.equalsoperator
b.assignmentoperator
c.extractionoperator
d.lessthanoperator
ANSWER:
B
4.Whatiswrongwiththefollowingstructuredefinition?
structMyStruct
{
intsize;
floatweight;
}
a.Nothing
b.Cannothavemixeddatatypesinastructure
c.missingsemicolon
d.Bracesarenotneeded.
ANSWER:
C
5.Giventhefollowingstrucuredefinitions,whatisthecorrectwaytoprinttheperson'sbirthyear?
structDateType
{
intday;
intmonth;
intyear;
}
structPersonType
{
intage;
floatweight;
DateTypebirthday;
}
PersonTypeperson;
a.cout<b.cout<c.cout<d.cout<ANSWER:
A
6.Giventhefollowingstrucuredefinition,whatisthecorrectwaytoinitializeavariablecalledtoday?
structDateType
{
intday;
intmonth;
intyear;
}
a.DateTypetoday（1,1,2000）;
b.DateTypetoday=（1,1,2000）;
c.DateTypetoday={1,1,2000）;
d.DateTypetoday={1,1,2000,0）;
ANSWER:
C
7.Whendefiningaclass,theclassshouldbecomposedofthekindofvaluesavariableoftheclasscancontain,and
a.memberfunctionsforthatclass
b.thekeywordprivate
c.otherclassdefinitions
d.nothingelse
ANSWER:
A
8.WhichofthefollowingisthecorrectfunctiondefinitionheaderforthegetAgefunctionwhichisamemberofthePersonclass?
a.intgetAge（）;
b.intgetAge（）
c.intPerson:
getAge（）
d.intPerson:
:
getAge（）
ANSWER:
D
9.Giventhefollowingclassdefinitionandthefollowingmemberfunctionheader,whichisthecorrectwaytooutputtheprivatedata?
classPerson
{
public:
voidoutputPerson（ostream&out）;
private:
intage;
floatweight;
intid;
};
voidPerson:
:
outputPerson（ostream&out）
{
//whatgoeshere?
}
a.out<b.out<c.out<d.outputPerson（person）;
ANSWER:
C
10.Whydoyouwanttousuallymakedatamembersprivateinaclass?
a.sothatnoonecanusetheclass.
b.ensuredataintegrity
c.providedataabstraction.
d.provideinformationhiding.
e.BandD
f.B,CandD
ANSWER:
F
11.Amemberfunctionofaclassshouldbemadeprivate
a.always
b.onlyifitwillneverbeused
c.ifitwillonlybeusedbyothermembersoftheclass
d.never,itisillegaltomakeamemberfunctionprivate.
ANSWER:
C
12.Amemberfunctionthatallowtheuseroftheclasstochangethevalueinadatamemberisknownas
a.amutatorfunction
b.amutation
c.amanipulatorfunction
d.anaccessorfunction
ANSWER:
A
13.AMemberfunctionthatallowstheuseroftheclasstoseethevalueinadatamemberisknownas
a.amutatorfunction
b.amutation
c.amanipulatorfunction
d.anaccessorfunction
ANSWER:
D
14.Ifyoudesignaclasswithprivatedatamembers,anddonotprovidemutatorsandaccessors,then
a.Theprivatedatamemberscanstillbeaccessedfromoutsidetheclassbyusingthe&operator
b.Thedatacannotbechangedorviewedbyanyone.
c.Noneoftheabove
d.AandB
ANSWER:
B
15.Aclassmemberfunctionthatautomaticallyinitializesthedatamembersofaclassiscalled
a.theinitfunction
b.anoperator
c.aconstructor
d.acast
ANSWER:
C
16.IfyouhaveaclassnamedmyPersonClass,whichofthefollowingcorrectlydeclareaconstructorintheclassdefinition?
a.myPersonClass:
:
myPersonClass（）;
b.myPersonClass（）;
c.init（）;
d.cast（）;
ANSWER:
B
17.giventhefollowingclassdefinition,howcouldyouusetheconstructortoassignvaluestoanobjectofthisclass?
classCDAccount
{
public:
CDAccount（）;
CDAccount（floatinterest,floatnewBalance）;
floatgetBalance（）;
floatgetRate（）;
voidsetRate（floatinterest）;
voidsetBalance（floatnewBalance）;
private:
floatbalance,rate;
};
andthefollowingobjectdeclaration
CDAccountmyAccount;
a.myAccount=CDAccount（floatmyRate,floatmyBalance）;
b.myAccount=CDAccount{myRate,myBalance};
c.myAccount=CDAccount[myRate,myBalance];
d.myAccount=CDAccount（myRate,myBalance）;
ANSWER:
D
18.Giventhefollowingclassdefinition,whatismissing?
classItemClass
{
public:
ItemClass（intnewSize,floatnewCost）;
intgetSize（）;
floatgetCost（）;
voidsetSize（intnewSize）;
voidsetCost（floatnewCost）;
private:
intsize;
floatcost;
};
a.nothing
b.adefaultconstructor
c.accessorfunctions
d.mutatorfunctions
ANSWER:
B
19.Giventhefollowingclassdefinition,howwouldyoudeclareanobjectoftheclass,sothattheobjectautomaticallycalledthedefaultconstructor?
classItemClass
{
public:
ItemClass（）;
ItemClass（intnewSize,floatnewCost）;
intgetSize（）;
floatgetCost（）;
voidsetSize（intnewSize）;
voidsetCost（floatnewCost）;
private:
intsize;
floatcost;
};
a.ItemClass（）myItem;
b.ItemClassmyItem（1,0.0）;
c.ItemClassmyItem;
d.ItemClassmyItem（）;
e.Youcannotdothis
ANSWER:
C
20.Adatatypeconsistingofdatamembersandoperationsonthosememberswhichcanbeusedbyaprogrammerwithoutknowingtheimplementationdetailsofthedatatypeiscalled
a.anabstractdefinitiontype
b.anavailabledatatype
c.anabstractdatatype
d.aprimitivedatatype
ANSWER:
C
21.WhichpartoftheADTtellstheprogrammerusingithowtouseit?
a.theimplementation
b.theinterface
c.theabstractness
d.thescoperesolution
ANSWER:
B
22.IfyouaredesigningaclassforanADT,youcantelliftheclassisanADTif
a.whenyouchangetheimplementationoftheclass,noneoftherestoftheprogramneedstochange.
b.whenyouchangetheinterfaceoftheclass,nothingelseneedstochange.
c.youchangetheprivtepartandtherestoftheprogramusingtheADTdoesnotcompile.
d.everythingmustbechanged.
ANSWER:
A
23.DevelopinganADTmeansthattheuserofyourclassdoesnothavetoknowthedetailsabouthowtheclassisimplemented.Thisisknownas
a.interface
b.implementation
c.testinganddebugging
d.informationhiding
ANSWER:
D
24.Giventhefollowingclass,whatwouldbethebestdeclarationforamutatorfunctionthatallowstheuseroftheclas
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