Hello, I think you have to distinguish in your mind between having a multi source-file program (as you would often do in C) and writing a library of functions (as in libc). If you can imagine your routines as in a library, then can put them quite easily into a Perl module. The point is that library routines are self-contained. You don't, for example, consider printf as part of your program; it is just a library routine you use. In Perl, this is a potential problem with the scope of objects as variables in a module are not local to that module! You can also use "our" to make them very visible. I don't know if this helps but I have written several modules because I believe in re-usable code.

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