class A {
public:
  virtual int foo() { return 1; }
};
class B {
public:
  int foo() { return 2; }
};
class C : public A, public B {};

int main()
{
  ///  return C().foo(); // request for member 'foo' is ambiguous
  C c;
  A* a = &c;

  return a->foo();
}

#if 0


yzaytsev:/home/yzaytsev % /usr/bin/g++ ./mult.cpp -o mult
yzaytsev:/home/yzaytsev % ./mult
yzaytsev:/home/yzaytsev % $?
1: Command not found.