重写 C++ 中的 static 方法

Question

I have a base class Character , that can Attack() , and derived classes Magician (10), Elf (5) or Giant (15). Magicians can evolve to BlackMagician (15)

each type of Character has a defined Power (in parenthesis). My question is how to associate a class with a static function getFamilyPower() and overrride it, accordingly.

The code is below: https://codecollab.io/@sdudnic/warriors

The idea is the following:

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

Only virtual methods can be overridden. But a static method cannot be virtual , as it has no this instance pointer from which to access a vtable. So each Character will need a non-static virtual method to report its current power level, eg:

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; }
};

Answer 2

I think you may be confusing static for const.

private: const int power = 10; // in base class for a default value of 10

//virtualize and override the Power function to the return the const int value.