C++

Polymorphic Base Needs virtual ~ in C++

C++ClassesVirtual Destructoradvanced

Deleting through a base pointer without a virtual destructor is undefined behaviour and skips the derived destructor.

expected output

~Derived ~Base 

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Typing classes code builds muscle memory for the symbols and indentation C++ uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.

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