C# 继承硬件分配； 多个父母的单一课程？

Question

This is for a HW assignment, so it shouldn't be very difficult. In any case, we are supposed to create a base class of a Weapon and then child classes of MeleeWeapon ,Spell, Projectile, each with additional weapon attributes. That part is not so difficult. I am getting stuck with the following:

"Create a class that represents a Player with a Name and a Weapon"

I can manage creating a player class, but I'm not sure how to account for the weapon.

Do I have three different player classes such as public class Player : Spell: Weapon or public class Player: MeleeWeapon : Weapon? I feel like there should be a way to have one player class, but I'm getting flustered with how to do that. The player class also needs a constructor; again this isn't too hard, but I don't know how to account for the choices in weapon type unless I have more than one player class.

Basically, it seems like I want to have one grand child class (Player) -> three possible child classes (MeleeWeapon, Spell, Projectile) -> one parent class (Weapon), but I'm confusing myself here.

Answer 1

You're entirely mis-reading the requirement. Take a closer look:

Create a class that represents a Player with a Name and a Weapon

It's not saying that a Player is a Name and a Weapon, it's saying that a Player has a Name and a Weapon.

The Player class should have two properties: Name and Weapon . This has nothing to do with inheritance.

Answer 2

You are confused. Take a step back and follow the instructions:

Create a class that represents a Player...

public class Player {}

...with a Name...

public class Player 
{
    public string Name { get; set; }
}

...and a Weapon.

public class Player 
{
    public string Name { get; set; }
    public Weapon EquippedWeapon { get; set; }
}

You can now create different players with different weapons:

var alice = new Player { Name = "Alice", EquippedWeapon = new MeleeWeapon() };
var bob = new Player { Name = "Bob", EquippedWeapon = new Spell() };

Answer 3

The assignment asks you to use a has-a relationship between player and weapon instead of is-a

So in your Player class you will have

class Player
{
    public string Name {get; protected set;}
    public Weapon CurrentWeapon {get; protected set;}
}