七夕节单身狗整活大赏

全程高能，请注意

//让我们尝试创建一个对象...
GirlFriend name = new GirlFriend(55,166);
//为了方便使用，我们定义一个函数，用于产生对象
Prorected void Ctor(int height,double weight,out GirlFriend girlFriend);
//女生的话
Prorected void Btor(int height,double weight,out BoyFriend boyFriend);
//什么，还想要自动化？
//那没关系，看下面的枚举......
enum FriendType
{
    BoyFriend = 1;
    GirlFriend = 2
}
//首先，我们为男女朋友定义一个基类
protect class Friend
{
    int height;
    double weight;
    //看，构造函数
    protect Friend(int nheight,double dwweight)
    {
        this.height = nheight;
        this.weight = dwweight;
    }
}
//让基类作为父容器
protect class BoyFriend:Friend{}
protect class GirlFriend:Friend{}
//让我们用模式化写完它吧
Prorected Friend FreindCreate(int height,double weight,FriendType ftor)
{
    Friend friend;
    return ftor switch
    {
         1 =>Ctor(height,weight,out friend);
         2 =>Btor(height,weight,out friend);
         -  => throw new Exception.SexNotExistException();
    };
}
//收工!