// This code illustrates a conversion member function.

#include <iostream>

using namespace std;

class Complex {
  public:
    Complex(double r, double i) : re(r), im(i) { }
    operator double () const { return re; }
  private:
    double re, im;
};

int main() {
    Complex c(1.2, 3.4);
    double d = c;		// Thanks, conversion member function!
    cout << "d is now " << d << '\n';
    return 0;
}