V10/libplot/lib4014/box.c

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#include <stdio.h>
#include "tek.h"
#define sSTEP 20
box(x0, y0, x1, y1) 
double	x0, y0, x1, y1;
{
	move(x0, y0);
	vec(x0, y1);
	vec(x1, y1);
	vec(x1, y0);
	vec(x0, y0);
}