目录前言一.构造函数1.构造函数的作用2.构造函数的语法 类名(){}二.析构函数1.析构函数的作用2.析构函数的语法~类名(){}三.构造函数的分类及调用1.两种分类方式：2.三种调用方式：四.拷贝构造函数调用时机五.构造函数
I\'m trying to write a set of filtering functions that can be chained together to progressively filter a data set. What\'s tricky about this is that I want to be able to define the filters in a differ
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