5 VOID z_div(c, a, b) doublecomplex *a, *b, *c;
7 extern void sig_die(char*, int);
8 void z_div(doublecomplex *c, doublecomplex *a, doublecomplex *b)
14 if( (abr = b->r) < 0.)
16 if( (abi = b->i) < 0.)
21 sig_die("complex division by zero", 1);
23 den = b->i * (1 + ratio*ratio);
24 cr = (a->r*ratio + a->i) / den;
25 c->i = (a->i*ratio - a->r) / den;
31 den = b->r * (1 + ratio*ratio);
32 cr = (a->r + a->i*ratio) / den;
33 c->i = (a->i - a->r*ratio) / den;