c, obj c enum without tag or identifier

Question

im learning cocos2d [open gl wrapper for objective C on iPhone], and now playing with sprites have found this in a example,

 enum {  
easySprite =   0x000000         


        

Answer 1

Enums are automatically assigned values, incremented from 0 but you can assign your own values.

If you don't specify any values they will be starting from 0 as in:

typedef enum {
 JPG,
 PNG,
 GIF,
 PVR
 } kImageType;

But you could assign them values:

typedef enum {
 JPG = 0,
 PNG = 1,
 GIF = 2,
 PVR = 3
 } kImageType;

or even

typedef enum {
 JPG = 100,
 PNG = 0x01,
 GIF = 100,
 PVR = 0xff
 } kImageType;

anything you want, repeating values are ok as well.

I'm not sure why they are given those specific values but they might have some meaning related to use.