It would be more elegant if, rather than a huge if elsif construct, you used an array with subroutine references. The main loop would shrink to 
while($alive) {
   $turn++;
   printf "Turn \#% 4d\t", $turn;

   push @histx, $x;
   push @histy, $y;
   push @histh, $heading;

   $pc = 0 if $pc < 0;
   $pc = CODESIZE - 1 if $pc >= CODESIZE;

   my $ci = $code[$pc];    # Current Instruction
   print $opcode[$ci], "\t";

   $pc++;    # Just like CPUs do

   $microcode[$ci]->(@some_params);

   $pc++;
   $alive = 0 if $turn > 1000;
}

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which makes the main loop easier to understand and the individual instructions' code easier to find. Also, I don't see any reason why you do while($alive) { ... ; $alive = 0 if $turn > 1000; } rather than just while($turn <= 1000).

Makeshifts last the longest.

In reply to Re: Very Simple Stack-based Language by Aristotle
in thread Very Simple Stack-based Language by orkysoft

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