#-------------------------------------------------------------------------- # ● 执行买入 #-------------------------------------------------------------------------- def do_buy(number) $game_party.lose_gold(number * buying_price) $game_party.gain_item(@item, number) end #-------------------------------------------------------------------------- # ● 执行卖出 #-------------------------------------------------------------------------- def do_sell(number) $game_party.gain_gold(number * selling_price) $game_party.lose_item(@item, number) end