BABAR C++ Course Running the Examples - HEPHY

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Plan of the dayEnumerationsFew more language featuresParticle data tablePolymorphic inheritancemnemonic names for integer codes grouped into setsenum Color { red, orange, yellow, green, blue, indigo, violet }Color c = green;enum Polygon { triangle = 3, quadrilateral, pentagon };• Color is programmer defined type• red, orange, etc are constants of type Color• c is declared as type Color with inital value ofgreen• c can change, but red, orange etc can not• enum values are converted to int when used inarithmetic or logical operations• default integer values start at 0 and increment by 1• can override the default.• but valued stored in variable which is an enumeratedtype is limited to the values of the enum• uniqueness of the enumerated values is guaranteed• slightly different from CBABAR C++ Course 160 Paul F. KunzBABAR C++ Course 161 Paul F. Kunz
Particle Data Table classLayoutHistory• written by Paul Rensing at SLAC• inspired from ParticleList class in the MC++project (a particle generator framework, seeLönnblad, et al, Comp. Phys. Commun., 71, 1, 1992)• not part of CLHEP• found in /nfs/juno/u5/src/clhep/bfastdirectoryµ ±π ±π 0K ±K 0ηρωK + →µ+νK + →e+νK + →π+π 0K + →π + π + π -K + →π + π 0 π 0K + →π 0 µ + νAListπ +π 0π 0AListAList• PDT has one data member:HepAList _entries• PDTEntry has data members for particle propertiesand an AList for list of decay modes• DecayMode has data members for branchingfraction and an AList for list ofchildren.• AList entries are pointers or references, not copiesBABAR C++ Course 162 Paul F. KunzBABAR C++ Course 163 Paul F. Kunz
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BABAR C++ CourseRunning the Example
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C++ Input and OutputMore on I/OIntr
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Declaring types and initializingTyp
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Relational OperatorsLogical operato
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Assignment operatorsOperator Preced
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Coding Styleswhile loopC/C++ is fre
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do-while Examplefor loopSnippet fro
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ArraysExample Code and a TestA coll
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Plan of the dayFunctionsFunctionsPo
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Header files used with definitionHe
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Functions in CHeader FilesFunction
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Pointers and ArraysPointer Arithmet
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Progression towards C++ styleExampl
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Line fit continuedCharacter Strings
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Formal ArgumentsReferencesConsider(
Page 31 and 32: More on declarationsconst PointerWe
Page 33 and 34: Inline FunctionsSummarySometimes, t
Page 35 and 36: ThreeVectorUsing a class objectCLHE
Page 37 and 38: Use of private keywordInitializing
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: Finally, find all B 0 -> D * D *Sum
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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