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10.1　子承父业——继承

**本节视频教学录像：10分钟**

继承是软件复用的一种形式。使用继承可以复用现有类的数据和行为，为其赋予新功能而创建出新类。复用能节省程序开发的时间，能重用经过实践检验和调试的高质量代码，提高系统的质量。

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