面向对象_封装练习

class 基类
{
private int _Id;
private string _Name;
private string _Sex;
//将获取到的Id转为字符串类型方便操作
public int Id
{
set {_Id = value;}
}
public string Idstr
{
get
{
if (_Id.ToString().Length == 18)
{ return _Id.ToString();}
else
{ return "错误！"; }
}
}
//将人名显示
public string Name
{
set { _Name = value;}
get { return _Name; }
}
//性别，只能是男或女
public string Sex
{
set { _Sex = value; }
get
{
if (_Sex == "男" || _Sex == "女")
{
return _Sex;
}
else
{
return " ";
}
}
}
}