function combat(fighter)
  fighter.hp = fighter.hp - fighter.damage
end

function cull_dead(fighter)
  if fighter.hp < 0 then
    fighter.dead = true
  end
end



function handler(fighter)
  combat(fighter)
  cull_dead(fighter)

  print(fighter.name, "HP now", fighter.hp, "damage", fighter.damage, "dead", fighter.dead)
end