All the "no strict refs" and "don't do that" comments are pretty much on the money. If you *do* have a good reason for doing it, you can also use string eval:

#!/usr/bin/perl
use strict;
use warnings;

our $f;
eval '$f = 10;';
print "f is $f\n";
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Where you make up the string to contain the code you need, for each assignment.

If you can change your save format, this is something Data::Dumper can do for you automatically. "You can specify names for individual values to be dumped if you use the "Dump()" method".