c++ - 在C++中重写静态方法

Question

我有一个基类Character，它可以Attack()，派生类Magician(10)，Elf(5)或Giant(15)。
魔术师可以进化为BlackMagician(15)
每种Character类型都有一个定义的Power(用括号括起来)。我的问题是如何将类与静态函数getFamilyPower()关联并相应地重写它。
代码如下:
https://codecollab.io/@sdudnic/warriors
这个想法如下:

class Character {
    static int power;
public:
    static int getPower() { return power; }
    virtual int Attack(Character *other) { /*...*/ }
};

class Magician : public Character {
    static int power = 10;
public:
    static int getPower() {return power; }
};

class Elf : public Character {
    static int power = 5;
public:
    static int getPower() {return power; }
};

class Giant : public Character {
    static int power = 15;
public:
    static int getPower() {return power; }
};

Answer 1

只能覆盖virtual方法。但是static方法不能是virtual，因为它没有可从中访问vtable的this实例指针。因此，每个Character将需要一个非静态的virtual方法来报告其当前功率电平，例如:

class Character
{
public:
    int health = 100;

    void Attack(Character *other) {
        int myPower = Power();
        int theirPower = other->Power();
        if (theirPower > myPower)
            health -= theirPower;
        else if (theirPower < myPower)
            other->health -= myPower;
    }

    virtual int Power() = 0;
    virtual void Evolve() {}
};

class Magician : public Character
{
public:
    bool isBlack = false;

    int Power() override { return isBlack ? 15 : 10; }

    void Evolve() override { isBlack = true; }
};

class Elf : public Character
{
public:
    int Power() override { return 5; }
};

class Giant : public Character
{
public:
    int Power() override { return 15; }
};