From owner-freebsd-questions@FreeBSD.ORG Fri Nov 5 18:14:02 2010 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id C6112106566B for ; Fri, 5 Nov 2010 18:14:02 +0000 (UTC) (envelope-from freebsd@edvax.de) Received: from mx01.qsc.de (mx01.qsc.de [213.148.129.14]) by mx1.freebsd.org (Postfix) with ESMTP id 834028FC0C for ; Fri, 5 Nov 2010 18:14:02 +0000 (UTC) Received: from r55.edvax.de (port-92-195-8-222.dynamic.qsc.de [92.195.8.222]) by mx01.qsc.de (Postfix) with ESMTP id 02AF23D975; Fri, 5 Nov 2010 19:14:00 +0100 (CET) Received: from r55.edvax.de (localhost [127.0.0.1]) by r55.edvax.de (8.14.2/8.14.2) with SMTP id oA5IDxax002650; Fri, 5 Nov 2010 19:14:00 +0100 (CET) (envelope-from freebsd@edvax.de) Date: Fri, 5 Nov 2010 19:13:59 +0100 From: Polytropon To: Alejandro Imass Message-Id: <20101105191359.2c047c29.freebsd@edvax.de> In-Reply-To: References: Organization: EDVAX X-Mailer: Sylpheed 2.4.7 (GTK+ 2.12.1; i386-portbld-freebsd7.0) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: FreeBSD Mailing list Subject: Re: how to generate pi in c X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Polytropon List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 05 Nov 2010 18:14:02 -0000 On Fri, 5 Nov 2010 13:39:05 -0400, Alejandro Imass wrote: > This is how I do it in perl > use constant PI => 4 * atan2(1, 1); > > In C it owuld probably be (using math.h): > > pi = 4.0*atan(1.0); Or use M_PI from /usr/include/math.h, as we already #include'd it. :-) #define M_PI 3.14159265358979323846 -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...