#include <iostream>
    #include <complex>
    using namespace std;

    class Base {
    public:
        virtual void f( int ) {
            cout << "Base::f(int)" << endl;
        }

        virtual void f( double ) {
            cout << "Base::f(double)" << endl;
        }

        virtual void g( int i = 10 ) {
            cout << i << endl;
        }
    };

    class Derived: public Base {
    public:
        void f( complex<double> ) {
            cout << "Derived::f(complex)" << endl;
        }

        void g( int i = 20 ) {
            cout << "Derived::g() " << i << endl;
        }
    };

    void main() {
        Base    b;
        Derived d;
        Base*   pb = new Derived;

        b.f(1.0);
        d.f(1.0);
        pb->f(1.0);

        b.g();
        d.g();
        pb->g();

        delete pb;
    }

#include <iostream>
#include <complex>
using namespace std;
                                                                                
int main() {
  int x=1, y=1;
  for( int i = 0; i < 100; ++i ) {
    ++y;
    // What will the next line do? Increment???????????/
    ++x;
  }
  cout << "x=" << x << " y=" << y <<endl;
  return 0;
}