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Initialization of a reference versus initialization of an object


The line

der x =
dynamic_cast<der&>(b);

constructs an object of type der and initializes it with dynamic_cast<der&>(b)

The line

der& y =
dynamic_cast<der&>(b);

just initializes a reference.

x.method();

calls method() on the separately constructed object.

y.method();

calls method() on the object y references, which is d.


Categories : C++

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