chapter76e数组.docx
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chapter76e数组.docx
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chapter76e数组
TRUE/FALSE
1.Theindexedvariables(members)ofanarraymustbeintegers.
ANSWER:
FALSE
2.Thelocationsofthevariousindexedvariablesinanarraycanbespreadoutalloverthememory.
ANSWER:
FALSE
3.Thefollowingarraydeclarationislegal
doublescores[]={0.1,0.2,0.3};
ANSWER:
true
4.Arrayscanbepassedtofunctions.
ANSWER:
TRUE
5.Arrayscanbereturnedfromafunction.
ANSWER:
FALSE
6.Ifafunctionisexpectingapassbyreferenceparameter,youcanpassanindexvariablefromanarrayofthesamebasetypetothatfunction.
ANSWER:
TRUE
7.Whenyouhaveafunctionthatexpectsanarray,itshouldalsoexpectthesizeofthearrayorthenumberofindexedvariableswithvaliddata.
ANSWER:
TRUE
8.Thefollowingfunctiondeclarationguaranteesthevaluesinthearrayargumentarenotchanged.
voidfunction1(intarray[],intnumElements);
ANSWER:
FALSE
9.Thefollowingfunctionwillworkwithanysizeintegerarray.
voidfunction1(intarray[],intnumElements);
ANSWER:
TRUE
10.Ifyouusetheconstmodifierinafunctiondeclaration,youdonotincludeitinthefunctiondefinition.
ANSWER:
FALSE
ShortAnswer
1.Writethecodetodeclareatwodimensionarrayofintegerswith10rowsand20columns.
ANSWER:
intarray[10][20];
2.Writethecodetodeclareanarrayof10doublesnamedlist;
ANSWER:
doublelist[10];
3.Themodifierthatguaranteesthatanarrayargumentwillnotbechangediscalled______.
ANSWER:
const
4.Howmanyindexedvariablesdoesthefollowingarrayhave?
intmyArray[]={1,2,3,6,5,4,7,1,2};
ANSWER:
9
5.Howmanyindexedvariablesdoesthefollowingarrayhave?
intmyArray[12]={1,2,3,6,5,4,7,1,2};
ANSWER:
12
6.Writethedeclarationforafunctionnamedfunct1thatexpectsanarrayoffloats,thenumberofelementsinthearrayanddoesnotreturnanyvalue.
ANSWER:
voidfunct1(floatmyArray[],intnumElements);
7.Ifyouputavalueinthesquarebracketsofaone-dimensionarrayparameter,thisvalueis_________bythecompiler.
ANSWER:
ignored
8.Ifyourindexusedtoaccesstheindexedvariablesofthearrayhasthevalueofanon-existentindex,thisiscalled_________
ANSWER:
Indexoutofrange,Indexoutofbounds,orillegal.
9.Thecomputerrememberstheaddressofwhichindexedvariable(s)inanarray?
______
ANSWER:
thefirst
10.Acomputer'smemoryconsistsofnumberedlocationscalled__________.
ANSWER:
bytes
11.Intheexpression
doublescore[10];
doubleiscalledthe___________ofthearray
ANSWER:
basetype
12.Intheexpression
cout< iiscalledthe ANSWER: indexorsubscript 13.An_______isusedtoprocessacollectionofdataallofwhichisthesametype ANSWER: array 14.Theindividualvariablesthatcompriseanarrayarecalled__________ ANSWER: indexedvariables,subscriptedvariables,orelements. 15.Indexesarenumberedstartingat_________ ANSWER: 0 MultipleChoice 1.Whatarethevalidindexesforthearrayshownbelow? intmyArray[25]; a.0-25 b.0-24 c.1-25 d.1-24 ANSWER: B 2.Whatiswrongwiththefollowingcode? floatscores[10],total; a.Cannotdeclareregularandarrayvariablestogether. b.Arraysmustbeintegers c.The10shouldbereplacedwithavariablename,whosevalueisinputfromtheuser d.Nothing. ANSWER: D 3.Givenanarraynamedscoreswith25elements,whatisthecorrectwaytoaccessthe25thelement? a.scores+25 b.scores[24] c.scores[25] d.scores[last] ANSWER: B 4.Whyshouldyouuseanamedconstantforthesizeofanarray? a.Readabilityofcode b.Makeschangestotheprogrameasier c.Helpsreducelogicerrors d.Alloftheabove ANSWER: D 例如: constintB=10; inty[B]; B一定要定义为const,否则错误. 5.Givenanarrayofintegersofsize5,howdoesthecomputerknowwherethe3rdindexedvariableislocated? a.Itadds3tothebaseaddressofthearray b.Itaddsspacefor3integerstothebaseaddressofthearray c.Itrememberswherealltheindexedvariablesofthearrayarelocated. d.Noneoftheabove ANSWER: B 6.Whatiswrongwiththefollowingcodefragment? constintSIZE=5; floatscores[SIZE]; for(inti=0;i<=SIZE;i++) { cout<<"Enterascore\n"; cin>>scores[i]; } a.Arrayindexesstartat1not0 b.Arraysmustbeintegers c.Arrayindexesmustbelessthanthesizeofthearray d.Shouldbecin>>scores[0]; ANSWER: C 7.Whichofthefollowingdeclareanarrayof5characters,andinitializesthemtosomeknownvalues? a.chararray[5]={'a','b','c','d','e'}; b.chararray[4]={'a','b','c','d','e'}; c.chararray[5]={''};我认为这个才对chararray[5]={''}; d.chararray[]={'a','b','d','e'}; e.AandC f.BandD g.alloftheabove ANSWER: E 8.Ifyoudeclareandinitializeanintegerarrayofsize10,butonlylist5values,whatvaluesarestoredintheremaining5indexedvariables? a.0 b.garbage c.0.0 d.'0' ANSWER: A 9.Arraysarealwayspassedtoafunctionusing a.passbyvalue b.passbyreference c.passbyarray d.youcannotpassarraystoafunction ANSWER: C 10.Givethefollowingdeclarations,whichofthefollowingisalegalcalltothisfunction? intmyFunction(intmyValue); intmyArray[1000]; a.cout< b.cout< c.myArray=myFunction(myArray); d.myArray[1]=myFunction(myArray[0]); e.AandB f.AandC g.BandD ANSWER: G 11.Whichofthefollowingfunctiondeclarationscorrectlyexpectanarrayasthefirstargument? a.voidf1(intarray,intsize); b.voidf1(int&array,intsize); c.voidf1(intarray[100],intsize); d.voidf1(floatarray[],intsize); e.Alloftheabove f.CandD g.AandB ANSWER: F 12.Whichofthefollowingfunctiondeclarationscorrectlyguaranteethatthefunctionwillnotchangeanyvaluesinthearrayargument? a.voidf1(intarray[],intsize)const; b.voidf1(intarray[],intsize); c.voidf1(int&array,intsize); d.voidf1(constintarray[],intsize); e.voidf1(intarray[],constintsize); ANSWER: D 13.Thefollowingfunctiondefinitionhasanerrorinit.Whatlineisthiserroron? 0.voidf1(constdoublearray[],intsize) 1.{ 2.inti=0; 3.while(i 4.{ 5.array[i]+=2; 6.cout< 7.i++; 8.} 9.} a.0 b.2 c.5 d.6 e.2 ANSWER: C 14.Whichofthefollowingfunctiondeclarationscouldbeusedtoinputdatafromthekeyboardintothearray? a.voidinput(intarray[],int&numElements,intMAX_SIZE); b.voidinput(intarray[],intnumElements,intMAX_SIZE); c.voidinput(int&array[],intnumElements,intMAX_SIZE); d.intarray[]input(intarray[],int&numElements,intMAX_SIZE); ANSWER: A 15.Ifwewantasearchfunctiontosearchanarrayforsomevalueandreturneithertheindexwherethevaluewasfound,or-1ifnotfound,whichofthefollowingprototypeswouldbeappropriate? a.voidsearch(constintarray,inttarget,intnumElements); b.voidsearch(constintarray,inttarget); c.intsearch(constintarray[],intnumElements); d.intsearch(constintarray[],inttarget,intnumElements); ANSWER: D 16.Giventhefollowingfunctiondefinitionforasearchfunction,andthefollowingvariabledeclarations,whichofthefollowingareappropriatefunctioninvocations? constintSIZE=1000; intsearch(constintarray[],inttarget,intnumElements); intarray[SIZE],target,numberOfElements; a.search(array[0],target,numberOfElements); b.result=search(array[0],target,numberOfElements); c.result=search(array,target,numberOfElements); d.result=search(array,target,SIZE); ANSWER: C 17.Giventhefollowingfunctiondefinition,willrepeatedcallstothesearchfunctionforthesametargetfindalloccurrencesofthattargetinthearray? intsearch(constintarray[],inttarget,intnumElements) { intindex=0; boolfound=false; while((! found)&&(index { if(array[index]==target) found=true; else index++; } if(found==true) returnindex; else return-1; } a.Yes b.No c.Impossibletotellwithoutlookingatthevaluesofthearray d.Itdependsonthevalueoftarget. ANSWER: B 18.Giventhefollowingfunctiondefinition,whatmodificationsneedtobemadetothesearchfunctionsothatitfindsalloccurrencesoftargetinthearray? intsearch(constintarray[],inttarget,intnumElements) { intindex=0; boolfound=false; while((! found)&&(index { if(array[index]==target) found=true; else index++; } if(found==true) returnindex; else return-1; } a.Addanotherparametertoindicatewheretostopsearching b.Addanotherparametertoindicatewheretostartsearching c.Thisalreadycanfindalloccurrencesofagiventarget d.Havethefunctionreturnthewholearray ANSWER: B 19.Whichsortalgorithmdoesthefollowingoutlinedefine? foribetween0andnumber_used-1inclusive puttheithsmallestelementatarray[i] a.sequential b.selection c.bubble d.swap ANSWER: B 20.Giventhefollowingclassandarraydeclaration,howwouldyouprintouttheageofthe10thpersoninthearray? classpersonClass { public: voidsetAge(intnewAge); voidsetGender(charnewGender); voidsetSalary(floatnewSalary); intgetAge(); chargetGender(); floatgetSalary(); private: intage; chargender; floatsalary; }; personClasspeople[100]; a.cout< b.cout< c.cout< d.cout< ANSWER: D 21.Whichofthefollowingarraydeclarationsarelegal? a.intarray[10]; b.intsize; cin>>size; intarray[size]; c.intarray[]={0,0,0}; d.constintsize=9; intarray[size]; e.Alloftheabove f.AllbutC g.AllbutB ANSWER: G 22.Whichofthefollowingfunctiondeclarationswillacceptthefo
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