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CodePattern/A 动机与模式/14 异常/readme.md

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异常主要发生在参数传递和代码块执行过程。一种原则是：软件不能挂掉。检查参数合理性、检查代码块执行可能的错误，并进行合理结果补齐，保持程序继续运行【 1 软件不能挂掉 】，另外一种情况是发生异常就抛出然后终止程序【 2 时间停止在那一刻 】，或者由上层函数接住，集中统一处理。【 3 预判可能的错误 】。