BABAR C++ Course Running the Examples - HEPHY

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Variable Scope, Initialization, andLifetimeConsider (ch2/scope.C)void f() {float temp = 1.1;int a;int b;cin >> a >> b;}if (a < b) {int temp = a; // This "temp" hides other onecout
Formal ArgumentsReferencesConsider(ch2/funcarg.C)void f(int i, float x, float *a) {i = 100;x = 101.0;a[0] = 0.0;}int j = 1;int k[] = {2, 3, 4};float y[] = {3.0, 4.0, 5.0};f(j, k[0], y);• in Fortran passing k or k(1) to function is the same• in C/C++ what’s the value of k[0] after callingf()?• upon calling f(), the compiler generated code toinitialize the argumentsint i = j;float x = k[0]; // note type conversionfloat *a = y; // init pointer to array• thus k[0] does not changeA way to reference the same location (C++ only)Reference (ch/simplecpp.C)float x = 12.1;float& a = x;float &b = x;• a and b are called a reference• a, b, and x are all the same memory location• the position of the “&” is optional• Don’t confuse a reference and a pointerint i = 3; // data objectint &j = i; // reference to iint *p = &i; // pointer to i• i has an address of a memory location containing3• j has the same address as i• the contents of p is the address of iint *p: i:j:int3BABAR C++ Course 56 Paul F. KunzBABAR C++ Course 57 Paul F. Kunz
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: Line fit continuedCharacter Strings
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 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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