软设上午题练习笔记（四）

缺乏、安全感 2024-04-21 19:29 7阅读 0赞

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这个loop代表循环（类似于for循环）

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原型模式（找关键字 clone client） 属于创建型

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单例模式（一个对象自行创建这个实例的类）

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抽象工厂模式 （找主要关键字，factory ）

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生成器模式 （找关键字 builder）

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python内没有switch

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候选关键字 能把少的字推出来，主属性就是候选关键字并集元素个数，非主属性就是剩下的个数。

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运算的时候中缀表达式转后缀，遇到数字时直接压栈，遇到运算符时取出栈内的最近两个放在前后，再将结果入栈

哈夫曼编码：只有N0和N2节点，且N0比N2多1 总结点数为奇数， 左0右1

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所有的兄弟节点连线，去掉除长子（左孩子）以外的所有连接线。第一棵树作为左子树，第二棵树作为右子树，第三棵树接到第二棵树的右子树上

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最小生成树的边条数，节点数-1，且构成过程不能有环，找权值最小的边。

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最小生成树策略每次找最小的，选择贪心法

SSL安全套接字

DNS域名解析

FTP文件传输协议

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snmp网络管理协议

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