public GameObject happinessText;
public GameObject hungerText;

public GameObject robot;
// Update is called once per frame
void Update()
{
    happinessText.GetComponent<Text>().text = "" + robot.GetComponent<Robot>().happiness;
    hungerText.GetComponent<Text>().text = "" + robot.GetComponent<Robot>().hunger;
    //happinessText.GetComponent<Text>().text = "" + robot.GetComponent<Robot>().happiness;
}

public int _hunger;
public int _happiness;


void Start()
{
PlayerPrefs.SetString("then", "05/06/2016 11:20:12");
    updateStatus();
}



    void updateStatus()
{
   if (!PlayerPrefs.HasKey("_hunger"))
    {
        _hunger = 100;
        PlayerPrefs.SetInt("_hunger", _hunger);

    } else {
        _hunger = PlayerPrefs.GetInt("_hunger");
    }

    if (!PlayerPrefs.HasKey("_happiness"))
    {
        _happiness = 100;
        PlayerPrefs.SetInt("_happiness", _happiness);

    } else {

        _happiness = PlayerPrefs.GetInt("_happiness");

    }

    if (!PlayerPrefs.HasKey("then")) //{
        PlayerPrefs.SetString("then", getStringTime());

        TimeSpan ts = GetTimeSpan();

        _hunger -= (int)(ts.TotalHours * 2);
        if (_hunger < 0)
            _hunger = 0;

        _happiness -= (int)((100 - _hunger) * ts.TotalHours / 5);

        if (_happiness < 0)
            _happiness = 0;

    }

public int hunger
{
    [OnSerialized]
    get { return _hunger; }
    set { _hunger = value; }
}

public int happiness
{
    [OnSerialized]
    get { return _happiness; }
    set { _happiness = value; }
}