/*			function declarations

			filename: dsp21ex.h
*/
complex		poly__polar(double P2[],complex, int);
complex		polar__pole();
complex		cmul(complex,complex);
complex		cdiv(complex,complex);
complex		cadd1(complex,complex,int);
complex		fixnp(complex);
void		poly__product(double C[], double D1[], double D2[], int);
void		poly__product1(double P1[], double AB[], int);
void		read__coeffs();
double		cabs1(complex);
void		zero__arrays();
void		power__series(); 
int		signx(double);