BABAR C++ Course Running the Examples - HEPHY

Operator Function ImplementationCompare Fortran and C++Implementationinline Hep3VectorF& Hep3VectorF::operator+=(const Hep3VectorF& p) {fx += p.x();fy += p.y();fz += p.z();return *this;}• does the accumulation as one would expect• this is a keyword representing a pointer to theobject’s own selfFortran vector sumC++ vector sumreal p(3), q(3)! ...q(1) = q(1) + p(1)q(2) = q(2) + p(2)q(3) = q(3) + p(3)Hep3VectorF p, q;// ...q += p;• this->fx is thus equivalent to fx• remember: use -> instead of . when you have apointer• or fx is shorthand for this->fx• recall that Hep3VectorF::x() is an in-linefunction itself• return *this returns the address of the object,thus the referenceBABAR C++ Course 88 Paul F. KunzBABAR C++ Course 89 Paul F. Kunz