BABAR C++ Course Running the Examples - HEPHY

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Arithmetic OperatorsExerciseBoth Fortran and C/C++ have operatorsFortran Purpose C or C++X + Y add x + yX - Y subtract x - yX*Y multiply x*yX/Y divide x/yMOD(X,Y) modulus x%yX**Y exponentiations pow(x,y)+X unary plus +x-Y unary minus -ypostincrement x++preincrement ++xpostdecrement x--predecrement --x• x++ is equivalent to x = x + 1• x++ means use it, then increment it• ++x means increment it, then use it.• sorry, can’t do x**2; use x*x instead(for sub-expressions like (x+y)**2, we’ll see sometricks later)What is the output of (ch2/prepostfix.C)Should be#include int main() {int i = 1;cout
Relational OperatorsLogical operators and ValuesBoth Fortran and C/C++ define relational operatorsFortran Purpose C or C++X .LT. Y less than x < yX .LE. Y less than or equal x yX .GE. Y greater than or equal x >= yX .EQ. Y equal x == yX .NE. Y not equal x != y• zero is false and non-zero is true• Warning: a common mistake isint i, j;// some code setting i and jif ( i = j ) {// some stuff}this sets i = j and then does some stuff if j isnon-zeroBoth Fortran and C/C++ have logical operations andvaluesFortran Purpose C or C++.FALSE. false value 0.TRUE. true value non-zero.NOT. X logical negation !xX .AND. Y logical and x && yX .OR. Y logical inclusive or x || y• any expression has a logical resultif ( i = j(k) ) {// do some stuff}• && and || evaluate from left to right and right handexpression not evaluated if it doesn’t need to be• the following never divides by zeroif ( d && (x/d < 10.0) ) {// do some stuff}• if bool type is supported, the true and false existsas constants.BABAR C++ Course 13 Paul F. KunzBABAR C++ Course 14 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: Declaring types and initializingTyp
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 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
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Key pointsClass explosion?• shoul
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Function TemplatesList or Array?Rem
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The Node and List classesProblemsDe
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IteratorsIterators++CompareSimpleAr
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Standard Template Library (STL)Feat
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Recall our test programPossible 4-V
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Use of Lorentz VectorMemory modelCo
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Even more of ImplementationWhat’s
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Class HierarchyObject HierarchyIn c
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Class hierarchyLockable classFor bo
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The classes involvedmain.ccFrom CLH
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Do particle type identificationIden
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Finally, find all B 0 -> D * D *Sum
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Particle Data Table classLayoutHist
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PDTEntry classDecayMode classParts
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Gismo HistorySome Gismo ClassesVers
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Surface classPlane classPart of the
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Gismo VolumePart of implementationP
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Back to implementationFollowing the
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As expectedVirtual destructorIn Cir
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BABAR C++ Course Running the Examples - HEPHY

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