Got it! Another question: to use /x or not to sue /x Check this code 
$program =~ s { /\*
  .*?
  \*/
} []gsx;

[download]
this will remove any comment in a c program. What's the role of /x (I believe it is for extended regulars expressions)??

In reply to Re^2: question of substitution by wannabeboy
in thread question of substitution by wannabeboy

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