Quick question, if I declare this pointer to a vector:

std::vector<int>* myVector = &someOtherVector;

Why does this not work?

*myVector[0] = 42;

And why does this work?

(*myVector)[0] = 42;

Thanks.

*myVector[0] = 42; evaluates to *(myVector[0]) = 42; because operator[] has a higher priority than operator*(). As a result, you're trying to dereference an integer which causes the error.

*myVector[0] = 42; evaluates to *(myVector[0]) = 42; because operator[] has a higher priority than operator*(). As a result, you're trying to dereference an integer which causes the error.

All clear now! Thank you very much.