#ifndef __POINT__

#define __POINT__

#include <stdio.h>

typedef struct point_
{
  float x, y, z ;
} point ;

point * Create_point () ;
void Destroy_point (point *) ;
void Load_point ( point * , float x , float y , float z ) ;
void Print_point ( point , FILE * ) ;
float radius ( point ) ;
point sum ( point , point ) ;
point diff ( point , point ) ;
point scale ( point , float ) ;
float dist ( point , point ) ;

#endif __POINT__