Is it possible to define enum of double type?

 
I would like to have enum with double values.
I tried C++ approach but got errors.
Is it possible to define type of enum elements in MQL4?
 

No, but you can use #define:

#define myDouble 1.2345678901234567890
 
Or combine an enum with an array.
enum t{A,B,C}
double V[]={1.23, 2.34, 3.45}
⋮
V[B] // 2.34
 
Thank you William, pretty clever and exactly what I need!