//DISPLAY 11.10 Program for a Class with an Array Member
//This is the definition for a class TemperatureList.
//Values of this type are lists of Fahrenheit temperatures.

#include <iostream>
#include <cstdlib>
using namespace std;

  const int MAX_LIST_SIZE = 50;

  class TemperatureList
  {
  public:
     TemperatureList( );
     //Initializes the object to an empty list.

     void addTemperature(double temperature);
     //Precondition: The list is not full.
     //Postcondition: The temperature has been added to the list.

     bool full( ) const;
     //Returns true if the list is full; false otherwise.

     friend ostream& operator <<(ostream& outs,
                                 const TemperatureList& theObject);
     //Overloads the << operator so it can be used to output values of
     //type TemperatureList. Temperatures are output one per line.
     //Precondition: If outs is a file output stream, then outs
     //has already been connected to a file.

  private:
     double list[MAX_LIST_SIZE]; //of temperatures in Fahrenheit
     int size; //number of array positions filled
  };

//This is the implementation for the class TemperatureList.

	TemperatureList::TemperatureList( ) : size(0)
	{
		//Body intentionally empty.
	}

	void TemperatureList::addTemperature(double temperature)
	{//Uses iostream and cstdlib:
		if ( full( ) )
		{
			cout << "Error: adding to a full list.\n";
			exit(1);
		}
		else
		{
			list[size] = temperature;
			size = size + 1;
 		}
 	}
	bool TemperatureList::full( ) const
	{
			return (size == MAX_LIST_SIZE);
	}
	//Uses iostream:
	ostream& operator <<(ostream& outs, const TemperatureList& theObject)
	{
		for (int i = 0; i < theObject.size; i++)
			outs << theObject.list[i] << " F\n";
		return outs;
}