void c_div(complex *c, complex *a, complex *b)
void c_div(complex *resx, complex *a, complex *b)
void c_div(complex *c, complex *a, complex *b)#endif{double ratio, den;double abr, abi;if( (abr = b->r) < 0.)	abr = - abr;if( (abi = b->i) < 0.)	abi = - abi;if( abr <= abi )	{	if(abi == 0)		sig_die("complex division by zero", 1);	ratio = (double)b->r / b->i ;	den = b->i * (1 + ratio*ratio);	c->r = (a->r*ratio + a->i) / den;	c->i = (a->i*ratio - a->r) / den;	}else	{	ratio = (double)b->i / b->r ;	den = b->r * (1 + ratio*ratio);	c->r = (a->r + a->i*ratio) / den;	c->i = (a->i - a->r*ratio) / den;	}}