[MacPerl] Cross-platform issue: directory separator

[Nobumi Iyanaga]

Hello,

I am writing some scripts for cross-platform use.  How can I determine the 
OS on which a script is running?  If it is a Mac, I will use ":" as 
directory separator; if it is a Windows, I will use "\\", and if it is a 
Unix, I will use "/".

Thank you in advance!

Nobumi Iyanaga
Tokyo,
Japan