You need to open target file for writing, not reading. 
open targetfile, ">source.ada" or die "Can't open: $!";

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Consider using scalars for your filehandles. See open. Also, if you are not calling perl with -w, you should consider adding "use warnings;" in addition to use strict.

In reply to Re: Converting a source code by duckyd
in thread Converting a source code by oblate kramrdc

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