How to add an enum or enumeration to a class in C++?

Obviously this is simple, but I keep forgetting one element or other of the syntax (usually the terminating semi-colon) so I thought if I made a post about it, I would never forget again, and if I did, I could look at my post and remember.

There are certain parts to an enum configuration:

1. The enum keyword.
2. The name of the enumerator. I name this one Items just as an example but it can be named anything you want almost (of course you can’t use C++ keywords).
3. The open bracket: {
4. The names of the items separated by comas:
   item1, item2, item3
   Each item has an integer value starting at 0 and incrementing by one. Optionally, you can change a value, and again, ever value thereafter will be +1. So if you want to start at 1 instead of at 0, you would put this:
   item1 = 1, item2, item3
   If you wanted to count from 1,2,3 and then 7,8,9 you could do this:
   item1 = 1, item2, item3, item7 = 7, item8, item9
   Also you can change every item by having every item by assigning every item.

5. The closing bracket: }
6. A statement closing semicolon: ;

   So the code for your Items enumerator look like this:

   ?

   1 2 3 4

   enum Items {     item1 = 1, item2, item3 };

   A basic class is shown here:

   ?

   01 02 03 04 05 06 07 08 09 10 11

   class NewObject { public:     // Public members and functions     NewObject();     ~NewObject(); protected:     // Protected members and functions private:     // Private members and functions };

   So to add an enum to you need to decide, is it a public, protected, or private enum? I think it is most common to have public enumerations so that is what my example shows.

   ?

   01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17

   class NewObject { public:     // Public members and functions     NewObject();     ~NewObject();       enum Items     {         item1 = 1, item2, item3     };   protected:     // Protected members and functions private:     // Private members and functions };

   Now you can use the enum on any instantiated class.

   Like this:

   Like Loading...

   Related