目录封装的定义封装的步骤示例总结封装的定义 封装就是把类的某些信息隐藏起来，并提供公开的方法给外部调用，这种编程模式就是封装
I have a Microsoft SQL Server database that contains a data field of BIT type. This field will have either 0 or 1 values to represent false and true.
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