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Private and Protected Members : C++可能的副本:私有和受保护成员:c++
I don't understand the difference between protected and private members or methods, as I assumed both will hide the member or the function to access from outside the class.
我不理解受保护成员和私有成员或方法之间的区别，因为我假设它们都将隐藏成员或从类外部访问的函数。
What is the difference between the protected and the private keywords?
受保护的关键字和私有关键字的区别是什么?
5 个解决方案
#1
52
private - only available to be accessed within the class that defines them.
私有的——只能在定义它们的类中访问。
protected - accessible in the class that defines them and in other classes which inherit from that class.
受保护-在定义它们的类中可访问，在从该类继承的其他类中可访问。
#2
6
Things that are private are only visible within the class itself.
私有的东西只在类本身中可见。
Things that are protected are visible in the class itself and in subclasses.
受保护的对象在类本身和子类中都是可见的。
#3
2
Private methods are usually visible to class instances (internal implementations), protected methods are visible to subclasses and classes in the same package (inheritance and restricted usage).
私有方法通常对类实例可见(内部实现)，受保护方法对同一包中的子类和类可见(继承和限制使用)。
#4
2
Private members can only be used by that classes members and its friends; protected members can be inherited by other classes, and can be used by the classes members and friends.
私有成员只能被该类成员及其朋友使用;受保护成员可以被其他类继承，并且可以被类成员和朋友使用。
#5
1
The difference is who can access those functions.
不同之处在于谁可以访问这些函数。
-
Private= only members of the same class can access the function.Private =只有同一个类的成员才能访问这个函数。
-
Protected= Same as private but derived classes can also access.Protected = private但派生类也可以访问。
#1
52
private - only available to be accessed within the class that defines them.
私有的——只能在定义它们的类中访问。
protected - accessible in the class that defines them and in other classes which inherit from that class.
受保护-在定义它们的类中可访问，在从该类继承的其他类中可访问。
#2
6
Things that are private are only visible within the class itself.
私有的东西只在类本身中可见。
Things that are protected are visible in the class itself and in subclasses.
受保护的对象在类本身和子类中都是可见的。
#3
2
Private methods are usually visible to class instances (internal implementations), protected methods are visible to subclasses and classes in the same package (inheritance and restricted usage).
私有方法通常对类实例可见(内部实现)，受保护方法对同一包中的子类和类可见(继承和限制使用)。
#4
2
Private members can only be used by that classes members and its friends; protected members can be inherited by other classes, and can be used by the classes members and friends.
私有成员只能被该类成员及其朋友使用;受保护成员可以被其他类继承，并且可以被类成员和朋友使用。
#5
1
The difference is who can access those functions.
不同之处在于谁可以访问这些函数。
-
Private= only members of the same class can access the function.Private =只有同一个类的成员才能访问这个函数。
-
Protected= Same as private but derived classes can also access.Protected = private但派生类也可以访问。