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第7讲:封装和包
1.封装思想:小孩堆雪人,不断加入
ch2可以用child类替换,因为total是类变量,即封装的方法,但是普通变量不可已替换
1.封装一般写成私有的
私有的变量在类的方法里授权
修饰符
包
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原文地址:https://www.cnblogs.com/blog932707727/p/6362816.html
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