/********************************************************************** * Copyright (c) Digital Equipment Corporation 1984, 1985, 1986. * * All Rights Reserved. * * Reference "/usr/src/COPYRIGHT" for applicable restrictions. * **********************************************************************/ /* * SCCSID: @(#)c_log.c 3.0 4/22/86 */ #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) ); }