BABAR C++ Course Running the Examples - HEPHY

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Data membersMemory modelLook again• Hep3VectorF contains 3 data members• declaration is like any other except no initializers areallowed• every instance of the class Hep3VectorF will haveits own 3 data members.• Hep3VectorF is a typeclass Hep3VectorF {public:// member functionsprivate:float fx, fy, fz;};Hep3VectorF x(1.0, 0.0, 0.0);Hep3VectorF y(0.0, 1.0, 0.0);Hep3VectorF z(0.0, 0.0, 1.0);• an object of type Hep3VectorF has a value (orstate) that is represented by the values of its datamembers (like a complex number)• the size of a Hep3Vector object is likely to be3*sizeof(float)ConsiderIn computer’s memory we havex:y:Objects:fx=1.fy=0.fz=0.Hep3VectorF x(1.0, 0.0, 0.0);Hep3VectorF y(0.0, 1.0, 0.0);fx=0.fy=1.fz=0.• an object is an instance of a class (type)• each object has its own dataCode:Hep3Vector()x()y()z()mag()phi()cosTheta()• one copy of the code for a class is shared by allinstances of the classBABAR C++ Course 70 Paul F. KunzBABAR C++ Course 71 Paul F. Kunz
Use of private keywordInitializing a class objectWe have• the following compiles• the following does not compile• this is called data hidingclass Hep3VectorF {public:float mag();float x();float dummy;// member functionsprivate:float fx, fy, fz;};Hep3VectorF x(1.0, 0.0, 0.0);cout
Page 1 and 2: BABAR C++ CourseRunning the Example
Page 3 and 4: C++ Input and OutputMore on I/OIntr
Page 5 and 6: Declaring types and initializingTyp
Page 7 and 8: Relational OperatorsLogical operato
Page 9 and 10: Assignment operatorsOperator Preced
Page 11 and 12: Coding Styleswhile loopC/C++ is fre
Page 13 and 14: do-while Examplefor loopSnippet fro
Page 15 and 16: ArraysExample Code and a TestA coll
Page 17 and 18: Plan of the dayFunctionsFunctionsPo
Page 19 and 20: Header files used with definitionHe
Page 21 and 22: Functions in CHeader FilesFunction
Page 23 and 24: Pointers and ArraysPointer Arithmet
Page 25 and 26: Progression towards C++ styleExampl
Page 27 and 28: Line fit continuedCharacter Strings
Page 29 and 30: Formal ArgumentsReferencesConsider(
Page 31 and 32: More on declarationsconst PointerWe
Page 33 and 34: Inline FunctionsSummarySometimes, t
Page 35: ThreeVectorUsing a class objectCLHE
Page 39 and 40: Access member functionsInline acces
Page 41 and 42: C++ designHomeworkC++ style• effi
Page 43 and 44: Member InitializersFunction Return
Page 45 and 46: Operator Function ImplementationCom
Page 47 and 48: Need Symmetric Operator FunctionsTh
Page 49 and 50: SummaryLevels of Abstraction in Phy
Page 51 and 52: Plan of the daySimpleFloatArray Cla
Page 53 and 54: Constructor Implementationscopy Imp
Page 55 and 56: operator= Member FunctionAssignment
Page 57 and 58: Key pointsClass explosion?• shoul
Page 59 and 60: Function TemplatesList or Array?Rem
Page 61 and 62: The Node and List classesProblemsDe
Page 63 and 64: IteratorsIterators++CompareSimpleAr
Page 65 and 66: Standard Template Library (STL)Feat
Page 67 and 68: Recall our test programPossible 4-V
Page 69 and 70: Use of Lorentz VectorMemory modelCo
Page 71 and 72: Even more of ImplementationWhat’s
Page 73 and 74: Class HierarchyObject HierarchyIn c
Page 75 and 76: Class hierarchyLockable classFor bo
Page 77 and 78: The classes involvedmain.ccFrom CLH
Page 79 and 80: Do particle type identificationIden
Page 81 and 82: Finally, find all B 0 -> D * D *Sum
Page 83 and 84: Particle Data Table classLayoutHist
Page 85 and 86: PDTEntry classDecayMode classParts
Page 87 and 88:
Gismo HistorySome Gismo ClassesVers
Page 89 and 90:
Surface classPlane classPart of the
Page 91 and 92:
Gismo VolumePart of implementationP
Page 93 and 94:
Back to implementationFollowing the
Page 95 and 96:
As expectedVirtual destructorIn Cir
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BABAR C++ Course Running the Examples - HEPHY

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