#ifndef COMPLEX_H
#define COMPLEX_H

class complex {
  public:
    double re, im;
  public:
    complex (const double x=0.0, const double y=0.0);
    complex & operator*= (const double a) {
      re *= a; im *= a;
      return * this;
    }
    complex & operator+= (const complex & a) {
      re += a.re; im += a.im;
      return * this;
    }
    complex & exp (const unsigned n);
    double    abs () const {
      return re * re + im * im;
    }
};

#endif // COMPLEX_H