Virtual functions and recursion

  class P { 
\fbox{P}
public: virtual int m(int i) { cout << i; return i==0 ? i : m(i-1); } }; class C : public P {
\fbox{C}
public: virtual int m(int i) { cout << "start"; return i<0 ? 0 : P::m(i); } };

slide: Virtual functions -- recursions