#include <iostream>
#include <vector>
#include <iomanip>
#include <sstream>


using namespace std;

class MenuItem
{
   public:
     int numberOfItems ;
     string name = "" ;
     double price ;

     std::string to_string_with_precision(double value, int precision) {
	     std::ostringstream oss;
	     oss << std::fixed << std::setprecision(precision) << value;
	     return oss.str();
      }

     MenuItem( string nameP, int numberOfItemsP , double priceP )
     {
        name = nameP ;
        numberOfItems = numberOfItemsP ;
        price = priceP ;
	 }
     virtual string getName()
      {
		 string formatted_string = to_string_with_precision(price, 2);
		 if ( price == 0 )
		   return name  ;
		 else
		   return name + " " + formatted_string ;
	  }
     virtual float getPrice()
      {
		 return price ;
	  }


};



class Menu
{
   public:
     vector< MenuItem* >  holderOfItems ;
     int noOfCols ;
     //int noItems = 0 ;

     virtual ~Menu()
     {
        for( int i1=0 ; i1< holderOfItems.size() ; i1++ )
          {
             delete holderOfItems[i1] ;
		  } //for
	 }

     void addItem( MenuItem* ptr)
     {
         holderOfItems.push_back( ptr ) ;
	 }


     virtual void display ()
     {
	    int index = 0 ;
        int leftItems = holderOfItems.size() ;
        for ( int i1=0 ; i1<holderOfItems.size() ; )
          {
			  int noOfColsCurrentRow = 0 ;
			  if (( leftItems - noOfCols ) > 0 )
			    {
                    noOfColsCurrentRow = noOfCols ;
                    leftItems -= noOfColsCurrentRow ;
				}
		      else
		        {
                   noOfColsCurrentRow = leftItems ;
                   leftItems = 0 ;
				}
				i1 += noOfColsCurrentRow ;
				for( int k1=0 ; k1 < noOfColsCurrentRow ; k1++ )
				  {
                    printf( "%-2d: %-20s  ", index+1  , holderOfItems[index]->getName().c_str() ) ;
                    // sprintf( "%2d: %10s  ", index  , holderOfItems[index]->getName().c_str() ) ;
                     index++ ;

			      }
                cout << endl ;

		  } //for
          cout << "Enter your selection:" ;

	 }
	 virtual int getSelection()
	  {
         int x1 ;
         cin >> x1 ;
         return x1 ;
	  }


};


class OrderMenu : public Menu
{
   public:
     OrderMenu()
      {
		 noOfCols = 2 ;
		 MenuItem* ptrItem = new MenuItem("Burger", 0 , 1 ) ;
		 addItem ( ptrItem ) ;
		 ptrItem = new MenuItem("Fries", 0 , 2 ) ;
		 addItem ( ptrItem ) ;
		 ptrItem = new MenuItem("Drink", 0 , 1.50 ) ;
		 addItem ( ptrItem ) ;
		 ptrItem = new MenuItem("Finish Order", 0 , 0 ) ;
		 addItem ( ptrItem ) ;


	  }


      void display()
       {
           while( true )
             {
                 Menu::display() ;
				 int input = getSelection() ;
				 cout << "Selected: " << input << endl ;
				 if ( input == holderOfItems.size() )
				   {
					  showOrder() ;
				      break ;
				   }
				 else
				   {
                      cout << "Enter number of items:" ;
                      int no = 0 ;
                      cin >> no ;
                      if ( no != 0 )
                        addToOrder( input, no ) ;
				   }

			 } //while( true )
       }
      //If the customer stated some number for the same item then we
      //increment.
      void addToOrder( int  inputP, int noP )
      {
         holderOfItems[inputP-1]->numberOfItems += noP ;
	  }

      void showOrder()
       {
		   cout << endl << endl ;
		   cout << "Current Order Details." << endl ;
		   float total = 0.0 ;
           for( int i1=0 ; i1 < holderOfItems.size()-1 ; i1++ )
             {
               if ( holderOfItems[i1]->numberOfItems > 0 )
                  {
					  cout << holderOfItems[i1]->getName() << " " <<
                       holderOfItems[i1]->numberOfItems << endl ;
                    total += holderOfItems[i1]->numberOfItems *
                             holderOfItems[i1]->getPrice() ;

				  }

			 } //for
			 //cout << "Your total is: " << total <<  endl ;
			 printf( "Your total is %.2f\n" , total ) ;


       }
};


int main ()
{
	  Menu* OrderMenuObj1 = new OrderMenu()  ;
      OrderMenuObj1->display() ;
      delete OrderMenuObj1 ;

    cout << "End of main." << endl ;
	return 0;
}