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ID：40224414
大小：160.97 KB
页数：12页
时间：2019-07-27
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1、1Chapter1C++TemplatesReadings:Sections1.6and1.72TemplatesType-independentpatternsthatcanworkwithmultipledatatypes.GenericprogrammingCodereusableFunctionTemplatesThesedefinelogicbehindthealgorithmsthatworkformultipledatatypes.ClassTemplatesThesedefinegenericclas
2、spatternsintowhichspecificdatatypescanbepluggedintoproducenewclasses.3FunctionTemplatesExampleGenericfunctiontofindamaximumvalueinagivenvectorIfargumentisavectortype,thencompilergeneratesacorrespondingfunctionwhereComparableisreplacedbyinttype.Similarlyfor
3、vector,vectoretc.Assumptioninthisexample:Operator4FunctionTemplatesUsageEachcalltofindMax()onadifferentdatatypeforcesthecompilertogenerateadi
4、fferentfunctionusingthetemplate.CompilerwillcomplainaboutfindMax(v4)becauseIntCellclassdoesnotdefinedoperator5、t{return4*side;}voidprint(ostream&out=cout)const{out<<"(square"<6、ut);returnout;}5AnexampleOperatorOverloadingComparisonoperator7、arator>constObject&findMax(constvector&arr,Comparatorcmp){intmaxIndex=0;for(inti=1;i8、)const{returnstrcasecmp(lhs.c_str(),rhs.c_str())<0;}};intmain(){vectorarr={"ZEBRA","alligator","crocodile"};cout<
5、t{return4*side;}voidprint(ostream&out=cout)const{out<<"(square"<6、ut);returnout;}5AnexampleOperatorOverloadingComparisonoperator7、arator>constObject&findMax(constvector&arr,Comparatorcmp){intmaxIndex=0;for(inti=1;i8、)const{returnstrcasecmp(lhs.c_str(),rhs.c_str())<0;}};intmain(){vectorarr={"ZEBRA","alligator","crocodile"};cout<
6、ut);returnout;}5AnexampleOperatorOverloadingComparisonoperator7、arator>constObject&findMax(constvector&arr,Comparatorcmp){intmaxIndex=0;for(inti=1;i8、)const{returnstrcasecmp(lhs.c_str(),rhs.c_str())<0;}};intmain(){vectorarr={"ZEBRA","alligator","crocodile"};cout<
7、arator>constObject&findMax(constvector&arr,Comparatorcmp){intmaxIndex=0;for(inti=1;i8、)const{returnstrcasecmp(lhs.c_str(),rhs.c_str())<0;}};intmain(){vectorarr={"ZEBRA","alligator","crocodile"};cout<
8、)const{returnstrcasecmp(lhs.c_str(),rhs.c_str())<0;}};intmain(){vectorarr={"ZEBRA","alligator","crocodile"};cout<
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