#include "mplot.h"void circ(double xc, double yc, double r){	Point p;	int rad;	p.x=SCX(xc);	p.y=SCY(yc);	if (r < 0) 		rad=SCR(-r);	else		rad=SCR(r);	ellipse(screen, p, rad, rad, 0, getcolor(e1->foregr), ZP);}