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lang-cpp
Carobject that you constructed hereCar(1). If you want to avoid this copy useemplace_back, e.g.vec.emplace_back(1). emplace_back will call any available constructor and contruct the object being added directly in the vector, without any copying.Carobjects and not pointers or references onCarobjects. Because of that, every time you push element into vector, it will make copy of that element and hence call copy constructor.this->weight=other.weight;can simply beweight=other.weight;. There's no need to explicitly dereferencethis.