protected
保护数据对于它们自己的类是私有的并且能被派生类继承.关键字keyword 也能用于指定派生,所有的公共和保护成员的基类可以变成保护的派生类.
相关文章:
- short作用
- short 关键字short用来修正数据类型,用来声明短整型变量....
- dynamic_cast作用
- 关键字dynamic_cast强制将一个类型转化为另外一种类型,并且在执行运行时时检查它保证它的合法性。如果你想在两个互相矛盾的类型之间转化时,cast的返回值将为NULL....
- new作用
- new可以给数据类型分配一个新结点并返回一个指向新分配内存区的首地址. 也可以对它进行初始化.中括号中的 size 可以分配尺寸大小....
- operator作用
- 关键字operator 用于重载函数.在上面语法中用特殊符(#)描述特征的操作将被重载.假如在一个类中,类名应当被指定.对于一元的操作, parameter-list 应当为空, 对于二元的操作,在operator右边的 parameter-list 应当包含操作数 (在operand 左边的被当作 this通过)....
- default作用
- default swich语句中的缺省条件....
- friend作用
- friend 关键字friend允许类或函数访问一个类中的私有数据....
- mutable作用
- mutable 关键字mutable 忽略所有const 语句.一个属于const对象的mutable 成员可以被修改....
- signed作用
- signed 关键字signed 用来修正数据类型,用来声明符号字符型型变量....
- 自定义类型结构struct
- 结构就是将基本类型组合在一起形成一个新类型,结构struct主要目地,方便编程和管理代码。比如一个二维平面的点point,有两个值x,y;这时定义成结构struct,编程代码看起来会非常清楚。如果不定义成结构struct用两个变量,当然问题是可以解决,但这样项目变大时将会是个灾难。...
- 自定义类型联合union
- 联合union与结构非常的类似,也是自定义类型。结构是将简单类型组成一起,联合union是也是将简单类型组在一起,但它占的内存是共用的。画个图应该会明白点。 联合还有很多运用,很多变化。只要记住一点就好,联合union是共用一块内存。这点记住了,不管再怎么运用变化,都能很快想明白。...
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