C++面向对象程序设计双语教程（第3版）课件 class 7-classes objects-4.pptx

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C++面向对象程序设计双语教程（第3版）课件 class 7-classes objects-4.pptx

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ObjectivesToabletodefineobjectsofotherclassesasclassmembersToknowhowtouseshallowcopyanddeepcopyToabletodefineanduseobjectarraysTounderstandthepurposeoffriendfunctionsandfriendclasses

01ObjectMembers03CopyMembers02ArraysofObjects04Friends

01ObjectMembers

ObjectMembersCaseStudy1Defineastudentclassthatname,dateofbirth,age.Thestudentobjectsdisplaythedataofastudent.attributesbehaviorClassTemplateformakingobjectsstudentblueprintname,DOB,ageprintWhatisDOB?Date:year,month,dayname,year,month,day,ageDateobjectObjectmember

ObjectMembersAclasscanhaveobjectsofanotherclassasdatamembers.Usingobjectmembersistomakesoftwarereusability.Acommonformofsoftwarereusabilityiscompositionoraggregation,inwhichaclasshasobjectsofanotherclass.

DeclarationofObjectMembersclassDate{public:Date(int,int,int);~Date();private:intyear,month,day;};Studentname:stringDOB:Dateage:int+student()+~student()+print():voidclassStudent{public:Student();~Student();voidprint();private:intage;DateDOB;//objectmemberstringname;};

InitializationofObjectMembersclassDate{public:Date(int,int,int);~Date();private:intyear,month,day;};classStudent{public:Student(string,int,int,int,int);~Student();private:intage;DateDOB;//objectmemberstringname;};Studentname:stringDOB:Dateage:int+student(string,int,int,int,int)+~student()+print():voidStudent::Student(stringname,intd,intm,inty,intage):DOB(d,m,y){this-name=name;this-age=age;coutStudentobjectiscreated\n;}memberinitializerintmain(){Studentstd(Helen,2000,9,30,18);return0;}

AccessingDataMembersofClassObjectsvoidStudent::print(){coutnameageendl;coutDOBendl;}voidStudent::print(){coutnameageendl;DOB.print();}classDate{public:Date(int,int,int);~Date();voidprint();private:intyear,month,day;};intmain(){Studentstd(Helen,2000,9,30,18);st