构造函数

class Player
{
public int id = 0;
public string name = "";
public int atk = 10;
public int hp = 10;

public Player()
{
name = "川普";
}
public Player(string name)
{
this.name = name;
Console.WriteLine("一个参数的构造");
}
public Player(string name,int atk):this(name)
{

this.atk = atk;
Console.WriteLine("两个参数的构造");
}
public Player(string name,int atk,int hp):this(name,atk)
{

this.hp = hp;
Console.WriteLine("三个参数的构造");
}

static void Main(string[] args)
{
Player player = new Player("王小虎",20,100);
}

}

继承

class A
{
public string name;
public int atk = 10;
public int hp = 10;

}

class B:A
{

public int satk = 5;
public int miss = 5;

public B()
{
name = "aaa";
}

}
class C
{
static void Main(string[] args)
{
B b = new B();
b.hp = 5;
b.name = "haha";
b.atk = 10;

}
}

构造与继承

class A
{
public string name;
public int atk = 10;
public int hp = 10;
public A(string name,int hp,int atk)
{
this.name = name;
this.hp = hp;
this.atk = atk;

}
}

class B:A
{

public int satk = 5;
public int miss = 5;

public B(string name, int hp, int atk,int satk,int miss):base(name,hp,atk)
{
this.satk = satk;
this.miss = miss;
}

}

如果B类不想继承A类的构造函数还想要独自构造函数，可以在A类中添加public A(){}
子类向父类可以隐式转换
父类向子类必须强制转换
可以拿父类的变量接收子类的实体，反之不行。

多态

方法的覆盖（知道就行）

class A
{
public string name;
public void Attack()
{
Console.WriteLine("a开始攻击");
}
}

class B : A
{

public int atk;
public new void Attack()
{
Console.WriteLine("b开始攻击");
}

}

方法的重写

class A
{
public virtual void Attack()
{
Console.WriteLine("啊啊啊");
}
}
class B : A
{
public override void Attack()
{
//base.Attack();
Console.WriteLine("吼吼吼");
}

}

多态的体现

class A
{
public virtual void Attack()
{
Console.WriteLine("啊啊啊");
}
}
class B : A
{
public override void Attack()
{
//base.Attack();
Console.WriteLine("吼吼吼");
}

}class C : A
{
public override void Attack()
{
//base.Attack();
Console.WriteLine("喵喵喵");
}

}
class D : A
{
public override void Attack()
{
//base.Attack();
Console.WriteLine("呜呜呜");
}

}
class M
{
static void Main(string[] args)
{

A a1 = new B();
A a2 = new C();
A a3 = new D();
a1.Attack();
a2.Attack();
a3.Attack();
}
}

最后输出三种叫声。