The  do_it_all() functions in the OP and here use methods for determining the biggest and smallest numbers from the argument list that I've extracted and respectively named  do_it_all_1() and  do_it_all_2() below.

c:\@Work\Perl\monks\pritesh_ugrankar>perl -wMstrict -le
"do_it_all_1(1, 2, 3);
 do_it_all_2(0, 1, 2, 3);
 ;;
 ;;
 sub do_it_all_1 {
   print qq{do_it_all_1: (@_)};
   ;;
   my $biggest = shift @_;
   foreach my $num (@_) {
       if ($num > $biggest) {
           $biggest = $num;
       }
   }
   ;;
   my $smallest = shift @_;
   foreach my $smallnum (@_) {
       if ($smallnum < $smallest) {
           $smallest = $smallnum;
       }
   }
   ;;
   print qq{smallest == $smallest,  biggest == $biggest};
   }
 ;;
 sub do_it_all_2 {
   print qq{do_it_all_2: (@_)};
   ;;
   my $biggest = @_;
   foreach my $bignum (@_) {
       if ($bignum > $biggest)
       {
           $biggest = $bignum;
       }
   }
   ;;
   my $smallest = @_;
   foreach my $smallnum (@_) {
       if ($smallnum < $smallest) {
           $smallest = $smallnum;
       }
   }
   ;;
   print qq{smallest == $smallest,  biggest == $biggest};
   }
"
do_it_all_1: (1 2 3)
smallest == 2,  biggest == 3
do_it_all_2: (0 1 2 3)
smallest == 0,  biggest == 4
[download]

Questions:

• Why does the call  do_it_all_1(1, 2, 3) return 2 as the smallest number in the argument list?
• Why does  do_it_all_2(0, 1, 2, 3) return 4 as the biggest?

(The foregoing is intended as propaganda for a Test::More development approach that might have uncovered these inconsistencies earlier.)

One other small perplexity. You describe the feedback given you regarding the code of the OP as "[t]hat I did not try to address the issue, but circumvented the issue ..." But the "issue" seems to be described in the paragraph beginning "Given a random series of numbers, ...", and your code seems to address this requirement statement directly. (Others have touched on this.) Can you clarify the dissatisfaction of your instructor/TA? It doesn't make sense to me. (The whole business about Linux Mint/Ubuntu/whatever seems entirely irrelevant.)

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