how to recognize a multiple line comment ?

[James Yu]

Dear all,

I am trying to define a rule for recognizing a multiple line comment in C, but I have not yet sueccessed.
Thus, I am posting my lex segment to this email and hope you can point out some mistakes for me.

== flex code segment ==
slash        "/"
asterisk    "*"
comment  ({slash}{asterisk}+([^*]|[\n])*{asterisk}+{slash})
== flex code segment ==

Any help would be gratefully appreciated,
James