polxy.c
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	#include<stdio.h>
	#include<math.h>
	#include<fonction.h>
	#include<constant.h>
	#include<dimension.h>
	#include<structure.h>

	/****************************************************************/
	/* nom: polxy */
	/* auteur: Jean-Paul Kneib */
	/* date: 10/02/92 */
	/* place: Toulouse */
	/****************************************************************
	* Global variables used :
	* - none
	*/

	struct polar polxy(struct point xy)
	{
	struct polar pol;
	pol.r = sqrt(xy.xxy.x + xy.yxy.y);
	pol.theta = atan2(xy.y, xy.x);
	return(pol);
	}