/* 
 * cpx.h - simple complex number package
 * version 2: struct pointer parameters & string dynamic allocation
 * CSE 413 demo 11/06 HP
 */

#ifndef CPX_H
#define CPX_H

typedef struct {   /* complex numbers with rectangular coordinates */
  double re, im;
} Complex;

/* return a complex number with real part = x and imaginary = y */
Complex mk_complex(double x, double y);

/* return the sum of complex numbers c and d */
Complex cpx_add(Complex* c, Complex* d);

/* return a representation of c as re+im i in a newly allocated string */
char* cpx2str(Complex* c);

#endif