#include "RationalNumber.h"
#include <iostream>

using namespace std;

//--------------------------------------constructors------------------------------------------------------:
RationalNumber::RationalNumber() //Default constructor
{
	top=1;
	lower=1;
}
RationalNumber::RationalNumber( int to, int lo ) //Constructor receiving numerator and denominator
{
   top = to;
  if (lo <= 0)
    lower = 1;
  else
    lower = lo;
}
RationalNumber::RationalNumber( const RationalNumber& C )//Copy constructor
{
  top = C.top;
  lower = C.lower;
}
//--------------------------------------------GetSet functions---------------------------------------------:
void RationalNumber::setTop(int to)
{
	top=to;
}
void RationalNumber::setLower(int lo)
{
	lower=lo;
	if(lower==0) //בדיקה שהמכנה שהוזן ע"י המשתמש לא שווה לאפס
	{
		lower=1;
		cout << "Error, entering the denominator equal number to 0.\nRe-enter the denominator." <<endl;
	}			
}
int RationalNumber::getTop() const
{
	return top;
}
int RationalNumber::getLower() const
{
	return lower;
}
//------------------------------------Functions simplifying rational number-------------------------------------------------:
void RationalNumber::Simplify()
{
   int largest=0, loop=0; 
   largest = top > lower ? top : lower;
   int gcd = 0; // greatest common divisor

   for ( loop = 2 ; loop <= largest ; loop++ )
       if ( top % loop == 0 && lower % loop == 0 )
          gcd = loop;

   if (gcd != 0) 
   {
      top /= gcd;
      lower /= gcd;
   }
}
//--------------------------------------------Arithmetic Operators-----------------------------------------:
RationalNumber RationalNumber::operator+( const RationalNumber A) 
{
	RationalNumber temp;
	temp.top = ( A.top * lower ) + ( A.lower * top );
	temp.lower = A.lower * lower;

    temp.Simplify();
	return temp;
}
RationalNumber RationalNumber::operator*( const RationalNumber A) 
{
	RationalNumber temp;
    temp.top = A.top * top;
    temp.lower = A.lower * lower;

    temp.Simplify();
	return temp;
}
RationalNumber RationalNumber::operator-( const RationalNumber A)
{ 
	RationalNumber temp; 
	temp.top = (top * A.lower) - (A.top * lower); 
	temp.lower = lower * A.lower;

	temp.Simplify();
	return temp;
}
RationalNumber RationalNumber::operator/( const RationalNumber A)
{ 
	RationalNumber temp; 
	temp.top = top * A.lower;
	temp.lower = A.top * lower;

	temp.Simplify();
	return temp;
}
//--------------------------------------------InputOutput Operations-----------------------------------------:
bool RationalNumber::operator>(const RationalNumber A)
{
	return ((top / lower) > (A.top / A.lower));
}
bool RationalNumber::operator<(const RationalNumber A)
{
	return((top / lower) < (A.top / A.lower));
}
RationalNumber RationalNumber::operator<<(const RationalNumber A)
{
	cout << A.top << "/" << A.lower;
}