lecture3 Structured Types and Classes

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1、C++DataTypesCS122AlgorithmsandDataStructuressimplestructuredintegralenumfloatingarraystructunionclassMW11:00am-12:15pm,MSEC101charshortintlongboolInstructor:XiaoQinLecture3:StructuredTypesandClassesfloatdoublelongdoubleaddresspointerreferenceaStudentanotherStudent.id900426

2、7.id9003421.firstname“David”.firstname“John”.lastname“Smith”.lastname“Powell”.school“NMT”.school“UNL”.major“CS”.major“IT”.age18.age19.weight156.6.weight178.5.healthGood.healthExcellent341structStudentTypestructtypeDeclarationenumHealthType{Poor,Fair,Good,Excellent};SYNTAXs

3、tructStudentType//declaresastructdatatype{//doesnotallocatememorystructTypeName//doesnotallocatememorylongid;{stringfirstname;stringlastname;DataTypeMemberName;stringschool;structmembersDataTypeMemberName;MemberListstringmajor;intage;floatweight;HealthTypehealth;};};Stud

4、entTypeaStudent;//declarevariablesofAnimalTypeStudentTypeanotherStudent;56AccessingstructMembersAggregateOperation
Dot(period)isthememberselectionoperator.isanoperationonadatastructureasawhole,asopposedtoanoperationonanindividualcomponentofthedataEXAMPLESstructureStudentT

5、ypeaStudent,anotherStudent;//declarevariables..ofAnimalType..aStudent.weightanotherStudent.country782ExamplesofAggregatestructOperationsaggregatestructoperationsanotherStudent=aStudent;//I/O,arithmetic,andcomparisonsofentireassignmentstructvariablesareNOTALLOWED!PrintStud

6、entData(aStudent);//alueparameteroperationsvalidonanentirestructtypeChangeAge(aStudent);//rvariable:assignmenttoanotherstructeferenceptervariableofsametype,passtoafunctionasaStudent=GetStudentData();//returnargument(byvalueorbyreference),returnasvalueoffunctionvalueofafun

7、ction910voidPrintStudentData(StudentTypeaStudent)PassingastructTypebyReference//PrintsoutvaluesofallmembersofaStudent//Precondition:allmembersofaStudentareassignedvoidChangeAge(StudentType&aStudent)/*inout*///Postcondition:allmembershavebeenwrittenout{//Adds1toagecout<<“ID

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