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Program Repair Shop

142

File-Scope my Variables

   13        my ($rounds, $round_temp, $squares, $page, $x, $y, $z,
           $cell, $player_move, @available_choices, $computer_move,
           @choices, $round, $winner, $player_move_pretty,
           $computer_move_pretty); 

• File-Scope my Variables

  • $squares, $page really are legitimate here

  • @choices and $cell are not used at all!

  • But most of these are actually small-scope variables

• Useful rule of thumb:

  • The shorter the name, the smaller the scope

• A variable named $x has no business living at file scope

• Either fix the scope, or fix the name

• Here we will fix the scope

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Copyright © 2002 M. J. Dominus