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Create ghost state exercise

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Patricia Aas 2021-10-05 10:23:28 +02:00
parent 99dab72e9b
commit 411d5cfb83
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exercises/17/17-classes-and-structs.md → exercises/17/ghost_state/17-ghost-state.md
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@ -5,15 +5,15 @@ In this exercise we will create a class that abstracts away common functionality
## Visibility
The main difference between `class` and `struct` is the default visibility. All members of a struct are publicly
accessible by default, so no accessors are needed if that is the intended behavior. A class on the other hand is private
by default, so some sort of `public:` access is needed to give users access to things like constructors and functions.
accessible by default. A class on the other hand is private by default, so some sort of `public:` access is needed to
give users access to things like constructors and functions.
Everything can be made private in a C++ class, even constructors.
## Default behavior
If possible, we want to rely on the default behavior of the member variables of a class. This simplifies the
construction of your class and reduces the things you need to worry about.
If possible, we want to rely on the default behavior of the member variables of a class. This simplifies the design of
your class and reduces the things you need to worry about.
```cpp
struct Position {
@ -34,8 +34,8 @@ When someone creates an instance of `Position` the x and y variables are always
create the class.
When someone wants to create an instance of `GridPosition`, they need to give the constructor the x and y values. You
could set them to 0 but they still need to be given. Trying to create an instance of `GridPosition` with no values given
will not compile.
could set them to 0, but they still need to be given. Trying to create an instance of `GridPosition` with no values
given will not compile.
## Game State