#include "Calculator.h"

int Calculator::run()
{
   std::cout << "Fractional calculator\n\n";

   while ( true )
   {
	  if ( ! readFraction() ) return 0;
	  if ( ! readOperation() ) return 0;
   }
}

bool Calculator::readFraction()
{
   std::cout << "fr> ";
   if ( ! (std::cin >> other) )
	  return false;

   ecci::Fraction previousResult = result;

   switch ( operador )
   {
	  case '+': result = result + other; break;
//      case '-': resultado = resultado - otra; break;
//	    case '*': result = result * other; break;
//      case '/': resultado = resultado / otra; break;

	  case 'c':
	  case 'C':
	  case ' ':
		 result = other;
		 std::cout << result << std::endl;
		 return true;

	  case '=':
		 return true;

	  default:
		 std::cout << "Err" << std::endl;
		 return true;
   }

   std::cout << previousResult << " " << operador << " " << other << " = " << result << std::endl;
   return true;
}

bool Calculator::readOperation()
{
   std::cout << "op> ";
   std::cin >> operador;

   switch ( operador )
   {
	  case '=':
		 std::cout << result << std::endl;
		 break;

	  case 'c':
	  case 'C':
		 result = 0;
		 std::cout << result << std::endl;
		 break;

	  case 'q':
	  case 'Q':
		 return false;
   }

   return std::cin.good();
}