c++中public、protected、private访问属性及继承

三种属性访问全权限：

	类成员函数	子类函数	友元函数	该类对象	类外
public	√	√	√	√	√
protected	√	√	√	×	×
private	√	×	√	×	×

 

类继承方法属性变化

	public	protected	private
public继承	public	protected	private
protected继承	protected	protected	private
private继承	private	private	private