// filename: TemperatureArray.cpp
/************************************
  This program uses the TemperatureList class that 
  contain an array of temperature values to demonstrate
  inserting items into arrays and outputing the values.
*************************************/
#include <iostream> // for cout 
#include <cstdlib>  // for the exit function
using namespace std;

  const int MAX_LIST_SIZE = 5;

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

     void add_temperature(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. Note this 
     // function does NOT change the values.

     friend ostream& operator <<(ostream& outs, 
                                 const TemperatureList& the_object);
     // 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
  };

int main() {

	TemperatureList myTemperatures;
	myTemperatures.add_temperature(90);
	myTemperatures.add_temperature(88);
	myTemperatures.add_temperature(70);
	myTemperatures.add_temperature(56);
	myTemperatures.add_temperature(77);

	// The following statement will have the object return an 
	// error message.
	myTemperatures.add_temperature(69);
	cout << myTemperatures;

	int temp;
    cin >> temp;
	return 0;
}


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

void TemperatureList::add_temperature(double temperature) {
    if ( full() ) {
        int temp;
        cout << "Error: adding "<<temperature << " to a full list.\n";
        cin >> temp;
        exit(1);
    }
    else {
        cout << "Added "<<temperature<<" as temp number "<<size<<endl;
        list[size] = temperature;
        size = size + 1;
    }
}

bool TemperatureList::full( ) const {
    return (size == MAX_LIST_SIZE);
}

ostream& operator <<(ostream& outs, const TemperatureList& the_object) {
    for (int i = 0; i < the_object.size; i++)
        outs << the_object.list[i] << " F\n";
    return outs;
}