Modern C++ for Absolute Beginners: A Friendly Introduction to C++ Programming Language and C++11 to C++20 Standards

© Slobodan Dmitrović 2020

S. DmitrovićModern C++ for Absolute Beginnershttps://doi.org/10.1007/978-1-4842-6047-0_29

29. Enumerations

Slobodan Dmitrović¹ 

(1)

Belgrade, Serbia

 

Enumeration, or enum for short, is a type whose values are user-defined named constants called enumerators.

There are two kinds of enums: the unscoped enums and scoped enums. The unscoped enum type can be defined with:

enum MyEnum

{

    myfirstvalue,

    mysecondvalue,

    mythirdvalue

};

To declare a variable of enumeration type MyEnum we write:

enum MyEnum

{

    myfirstvalue,

    mysecondvalue,

    mythirdvalue

};

int main()

{

    MyEnum myenum = myfirstvalue;

    myenum = mysecondvalue; // we can change the value of our enum object

}

Each enumerator has a value of underlying type. We can change ...