是否有一个访问修饰符，它允许继承类修改c＃中父类的成员？

Question

有没有办法限制评论中概述的这些类的成员的访问权限;

class a 
{ 
    int p //should be accessable by b,c, but not by x 
} 

class b:a 
{ 
    int q //should be accessable by c, if it has to by a, but not by x 
} 

class c:b 
{ 
    public int r //obviously accessable by anyone 
} 

class x 
{ 
    c testfunction() 
    { 
     c foo=new c(); 
     foo.r=20; 
     return foo; 
    } 
} 

这是比这里的示例代码更复杂一点，但我认为我得到了我的问题。

Answer 1

是 - 那将是protected访问修饰符 - 允许后代访问它，但不允许“外部”用户访问。

class a 
{ 
    protected int p //should be accessable by b,c, but not by x 
} 

class b:a 
{ 
    protected int q //should be accessable by c, if it has to by a, but not by x 
} 

class c:b 
{ 
    public int r //obviously accessable by anyone 
} 

马克