//  File: fraction.h
//
//  A fraction ADT.  Demonstrates operator overloading.

#include <iostream.h>

class Fraction {

public:

   // Constructors
   //
   Fraction(int =0, int =1) ; 	// default = 0/1

   // Arithmetic Operators
   //
   Fraction operator +(const Fraction& b) const ;	// addition
   Fraction operator -(const Fraction& b) const ;	// subtraction
   Fraction operator *(const Fraction& b) const ;	// multiplication
   Fraction operator /(const Fraction& b) const ;	// division
   Fraction operator -() const ;					// unary negation
  
   // Binary Relational Operators:
   //   non-zero return value = YES, zero return value = NO
   //
   int operator <(const Fraction& b) const ;
   int operator <=(const Fraction& b) const ;
   int operator ==(const Fraction& b) const ;
   int operator >=(const Fraction& b) const ;
   int operator >(const Fraction& b) const ;

   // Test functions
   int is_zero() const ;
   int is_one() const ;
   int is_int() const ;

   // Conversion
   int floor() const ;
   int ceiling() const ;

   // Input/Output
   void display(ostream& = cout) const ;	// show fraction

private:

   int numer ;
   int denom ;
} ;


// Iostream << and >> operators overloaded

istream& operator >>(istream&, Fraction&) ;
ostream& operator <<(ostream&, const Fraction&) ;