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/******************************************************************/
/* This file is part of the homework assignments for CSCI-427/527 */
/* at The College of William & Mary and authored by Pieter Peers. */
/* No part of this file, whether altered or in original form, can */
/* be distributed or used outside the context of CSCI-427/527 */
/* without consent of either the College of William & Mary or */
/* Pieter Peers. */
/******************************************************************/
#ifndef _INTERVAL_H_
#define _INTERVAL_H_
#include <ostream>
#include "constants.h"
class interval
{
public:
//////////////////
// Constrructor //
//////////////////
interval(float lower=-LARGE, float upper=+LARGE);
interval(const interval& i);
///////////////
// Operators //
///////////////
interval& operator=(const interval& i);
interval operator+(float v) const;
interval operator-(float v) const;
interval operator*(float v) const;
interval operator/(float v) const;
interval& operator+=(float v);
interval& operator-=(float v);
interval& operator*=(float v);
interval& operator/=(float v);
////////////////
// Inspectors //
////////////////
float lower(void) const;
float upper(void) const;
bool empty(void) const;
//////////////
// Mutators //
//////////////
void intersect(const interval& i);
/////////////
// Friends //
/////////////
friend void swap(interval& a, interval& b) { a._swap(b); }
friend std::ostream& operator<<(std::ostream& s, const interval& i)
{
s << "[" << i.lower() << ", " << i.upper() << "]";
return s;
}
private:
/////////////////////
// Private Methods //
/////////////////////
void _assign(const interval& i);
void _swap(interval& i);
//////////////////////////
// Private Data Members //
//////////////////////////
float _lower, _upper;
};
#endif /* _INTERVAL_H_ */
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