/***********************************************************
PROJECT: FractionADT
FILE: testFractKBD.cpp - a testing program for ADT Fraction
AUTHORS: Designed by R. Fecteau & W.W. Kirchherr
         Revised by Dale Roberts
LAST REVISED: 09.12.2003 DBR
************************************************************/

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

using std::cout;
using std::endl;

int main()
{
  Fraction f, g, half(1,2), sum, diff, prod, quotient, neg, answer;
  bool done = false;
  int readResult, cmpResult;

  // Print instructions for the user
  cout << "To enter a fraction enter two integers separated by one space." << endl;
  cout << "To indicate end of data enter 9999 for the numerator" << endl;
  cout << "of the first fraction.  Use any denominator except 0." << endl << endl;

  // This loop always executes at least once, so use the do/while
  // post-test loop.

  do
  {
    cout << "Enter your first fraction > ";
    readResult = Fraction::getFract( cin, f );
    if (readResult == 0 )
    {
      cout << "Error entering fraction" << endl;
    }
    else if ( f.getNumerator() == 9999 )
    {
      done = true;
    }
    else
    {
      cout << "Enter another fraction > ";
      readResult = Fraction::getFract(cin, g);
      if ( readResult == 0 )
      {
        cout << "Error enterering fraction" << endl;
      }
      else
      {
        // Perform Calculations
        neg = Fraction::negateFract(f);
        sum = Fraction::addFract(f,g);
        diff = Fraction::subFract(f,g);
        prod = Fraction::mulFract(f,g);
        quotient = Fraction::divFract(f,g);
        cmpResult = Fraction::compareFract( f, g );
        /* (f + g) - ( f * -(1/2) ) */
        answer = Fraction::subFract(
          Fraction::addFract( f,g ),
          Fraction::mulFract(f,Fraction::negateFract(half)));

	/* Display output */
        cout << endl; 
        cout << "F1 = "; Fraction::putFract(cout, f); cout << endl;
        cout << "F2 = "; Fraction::putFract(cout, g); cout << endl;
        cout << "Neg = "; Fraction::putFract(cout,neg); cout << endl;
        cout << "Sum = "; Fraction::putFract(cout,sum);
        cout << "  Diff = "; Fraction::putFract(cout,diff);
        cout << "  Prod = "; Fraction::putFract(cout,prod);
        cout << "  Quot = "; Fraction::putFract(cout,quotient);	cout << endl;
        if ( cmpResult == 0 ) 
        {
          cout << "equal" << endl;
	}
        else if (cmpResult < 0 ) 
        {
          cout << "less" << endl;
	}
        else
        {
          cout << "Greater" << endl;
	}
        cout << "Try one nested: " << endl;
        cout << "(f + g) - ( f * -(1/2) ) = ";
        Fraction::putFract(cout,answer); cout << endl;
        cout << "==========================================" << endl;

      }
    }
  } while (!done);
  return 0;
}