Problem in Centaur

[ibrahim@fit.qut.edu.au (Rosziati Ibrahim)]

 Hi
 I'm a beginner in learning centaur tool. So bear with me.
 I'm following the tutorial exercise for creating Exp language.
 If I want to expand the type of the language to type real, string 
 and character, what sort of digits/characters that I should change in the 
 Exp.tokens file?
 ie for integer [0-9][0-9]*
    for char [a-zA-Z]   - perhaps(?)
    for string [a-zA-Z][a-zA-Z_0-9]* -perhaps(?)
    for real  [0.0-9.9] - ??????


 Please help me regarding this issue.

Rosziati Ibrahim
PhD Candidate
School of Computing Science 
Faculty of Information Technology 
Queensland University of Technology (QUT)  
GPO Box 2434
Brisbane QLD 4001 
Australia
( Tel : +61 7 38641290
  Fax : +61 7 38641801
  email: ibrahim@fit.qut.edu.au
  homepage: http://www.fit.qut.edu.au/~ibrahim  )