C++

Runtime Polymorphism in C++

C++InheritanceVirtual Functionsintermediate

A pure virtual function makes the class abstract. The call dispatches to the derived override through the vtable.

expected output

9

Why practise typing this

Typing inheritance 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.

More C++ practice

Browse all C++ snippets →