## Linux compilation

    > mkdir build
    > cd build
    > cmake -DCMAKE_BUILD_TYPE=Debug ..
    > make

## Exercise 1

* Go into directory *Core* and implement *Time* and *TimeObserver* class
* Class *Time* should have 4 methods:     
    * void attach(TimeObserver* observer); -> attach observer
    * void detach(TimeObserver* observer); -> detach observer
    * Time& operator++(); -> increment day and notify observers
    * size_t day() const; -> return current day
* Go into directory *Ship* and make *Ship* class inherit from *TimeObserver*
* Each time the observer will be triggered, you should give the crew food and drink
* Each crew member should consume **1** rum and **1** banana (I know they usually eat biscuits)
* If you don't have enough cargo crew should rebel
* Each day of a rebel you should subtract **5** members of the crew
* If the number of crew drops below **0**, throw an exception "Game Over"

Example (We have 40 members of crew):
Day: 0
crew: 40
|----------------|----------------|
|      NAME      |     AMOUNT     |
|----------------|----------------|
|Rum             | 300            |
|Banana          | 200            |
|Banana          | 150            |
|----------------|----------------|

DAY: 1
crew: 40
|----------------|----------------|
|      NAME      |     AMOUNT     |
|----------------|----------------|
|Rum             | 260            |
|Banana          | 160            |
|Banana          | 150            |
|----------------|----------------|

DAY: 2
crew: 40
|----------------|----------------|
|      NAME      |     AMOUNT     |
|----------------|----------------|
|Rum             | 220            |
|Banana          | 120            |
|Banana          | 150            |
|----------------|----------------|

DAY: 3
crew: 40
|----------------|----------------|
|      NAME      |     AMOUNT     |
|----------------|----------------|
|Rum             | 180            |
|Banana          | 80             |
|Banana          | 150            |
|----------------|----------------|

DAY: 4
crew: 40
|----------------|----------------|
|      NAME      |     AMOUNT     |
|----------------|----------------|
|Rum             | 140            |
|Banana          | 40             |
|Banana          | 150            |
|----------------|----------------|

DAY: 5
crew: 40
|----------------|----------------|
|      NAME      |     AMOUNT     |
|----------------|----------------|
|Rum             | 100            |
|Banana          | 150            |
|----------------|----------------|

DAY: 6
crew: 40
|----------------|----------------|
|      NAME      |     AMOUNT     |
|----------------|----------------|
|Rum             | 60             |
|Banana          | 110            |
|----------------|----------------|

DAY: 7
crew: 40
|----------------|----------------|
|      NAME      |     AMOUNT     |
|----------------|----------------|
|Rum             | 20             |
|Banana          | 70             |
|----------------|----------------|

********** Crew rebel **********

DAY: 8
crew: 35
|----------------|----------------|
|      NAME      |     AMOUNT     |
|----------------|----------------|
|Banana          | 30             |
|----------------|----------------|

********** Crew rebel **********

DAY: 9
crew: 30
|----------------|----------------|
|      NAME      |     AMOUNT     |
|----------------|----------------|
|----------------|----------------|

********** Crew rebel **********

DAY: 10
crew: 25
|----------------|----------------|
|      NAME      |     AMOUNT     |
|----------------|----------------|
|----------------|----------------|

## Exercise 2

* Go into directory *Store* and make *Store* class inherit from *TimeObserver*
* Class *Store* should don't know anything about class *Time*
* We should attach and detach observer outside of class. Think about how you can make it exception-safe (RAII) 
* Each time the observer will be triggered, you should change the number of available cargo in the store
* Each time draw a number between -50 and 50 and add it to the amount of cargo
* Print everyday cargo from the Shop and verify if the amount changes

## Exercise 3

* Rewrite Observer to use modern approach -> by value semantic.
* Rewrite class Ship
* Rewrite class Store
* Question: Which class was easier to rewrite?