z_log.c

<B>Digital的Unix操作系统VAX 4.2源码</B>

/*
 *	"@(#)z_log.c	1.1"
 */

#include "complex"

z_log(r, z)
dcomplex *r, *z;
{
double log(), cabs(), atan2();

r->dimag = atan2(z->dimag, z->dreal);
r->dreal = log( cabs( z->dreal, z->dimag ) );
}