C++ Return value, reference, const reference

Question

Can you explain to me the difference between returning value, reference to value, and const reference to value?

Value:

Vector2D oper         


        

Answer 1

As pointed out but luk32 it is just to ensure that no changes are allowed to the objects returned by this function. This can basically help you in finding your logical errors at compile time. Suppose you are sure not to change a object, and your code is changing the object, it can be tracked. It can be thought of a good coding practice.