此资料为sony3172和4103的，网上很难找的哦！对开发监控安放的很有帮助

定义一个名为Date的类用于输入并验证日期合法性-Define a class named Date is used to enter and verify the date of legitimacy

物品库存管理用文件系统实现的物品库存管理程序。已经调试没有错误。希望对需要的人有帮助。-Paper goods inventory management system with inventory management procedures for the goods. Has been no error debugging. Would like to help people in need.