说明: 给出了一个订餐菜单,用户选择需要的食物,给出付款总额,记录订单并保存到文件 1,"大米饭",1.0, 2,"冷面",3.0, 3,"兰州拉面",5, 4,"刀削面",5, 5,"菜粥",0.5, 6,"南瓜粥",1, 7,"糯米粥",1, 8,"黑米粥",1, 9,"燕麦粥",1, 10,"红烧肉",3, 11,"红烧鱼",5, 12,"北京烤鸭",10, 13,&qu ot;啤酒鸭",6, 14,"猪肚",8, 15,"牛肉",15, 16,"青菜",0.8, 17,"白菜",1, 18,"
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