Enumerations
Enumerations definitions are written in CamelCase. Preferably, use scoped enumerations, below is an adapted example from the cppreference website.
Example
enum class Altitude: char
{
HIGH='h',
LOW='l', // C++11 allows the extra comma
};
The enumerators names are written in UPPERCASE.
Example
enum class Direction
{
LEFT,
RIGHT,
UP,
DOWN,
};