BABAR C++ Course Running the Examples - HEPHY

ThreeVectorUsing a class objectCLHEP’s ThreeVector class (simplified)class Hep3VectorF {public:Hep3VectorF();Hep3VectorF(float x, float y, float z);Hep3VectorF(const Hep3VectorF &v);float x();float y();float z();float phi();float cosTheta();float mag();// much more not shownprivate:float fx, fy, fz;};• this is the header file• keyword class starts the declaration which iscontained within the {}• sort of like the function prototypes• an object of a class contains data• an object of a class has certain functions associatedwith itConsider (clhep/threeVector0.C)#include #include int main() {float x, y, z;while ( cin >> x >> y >> z ) {Hep3VectorF aVec(x, y, z);cout