c_log.c

<B>Digital的Unix操作系统VAX 4.2源码</B>

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

#include "complex"

c_log(r, z)
complex *r, *z;
{
double log(), cabs(), atan2();

r->imag = atan2(z->imag, z->real);
r->real = log( cabs(z->real, z->imag) );
}