BABAR C++ Course Running the Examples - HEPHY

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Another Possible 4-Vector ClassInheritanceMight look like…class HepLorentzVectorF {public:HepLorentzVectorF();HepLorentzVectorF(float x, float y, float z, float t);HepLorentzVectorF(const HepLorentzVectorF &v);inline float x();inline float y();inline float z();inline float t();inline float mag();// much more not shownprivate:Hep3VectorF vec3;float ft;};• HepLorentzVectorF has-a Hep3VectorF• let 3-vector component do part of the workfloat HepLorentzVectorF::mag() {return sqrt(ft*ft - vec3.mag2() );}• must still implement functions likefloat HepLorentzVectorF::x() {return vec3.x();}Part of the header file (CLHEP/LorentzVector.h)class HepLorentzVectorF : public Hep3VectorF {public:HepLorentzVectorF();HepLorentzVectorF(float x, float y, float z, float t);HepLorentzVectorF(const HepLorentzVectorF &v);HepLorentzVectorF(const Hep3VectorF &p, float t);float t();float mag();// much more not shownprivate:float ft;};• HepLorentzVectorF is-a Hep3VectorF• All public members of Hep3VectorF are alsopublic members of HepLorentzVectorF by use ofkeyword public in class declaration.• member function t() is added• member function mag() overrides function of samename in Hep3VectorF• constructors take different arguments• one new data member: ftBABAR C++ Course 132 Paul F. KunzBABAR C++ Course 133 Paul F. Kunz
Use of Lorentz VectorMemory modelConsider (clhep/fourVector0.h)int main() {float x, y, z, t;while ( cin >> x >> y >> z >> t ) {Hep3VectorF a3Vec(x, y, z);HepLorentzVectorF a4Vec(x, y, z, t);}cout
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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
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 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: Recall our test programPossible 4-V
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
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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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