如何在子类中重写父类的重载运算符+函数？

Question

问题遇到的现象和发生背景

如何在子类中重写父类的重载运算符+函数？
其中父类是个抽象类，它的重载运算符+函数是个纯虚函数。

问题相关代码，请勿粘贴截图

class Father
{
public:
virtual Father* operator+(Father*) = 0;
};

class Son:public Father
{
public:
Son(int a, int b) {
this->a= new int(a);
this->b= new int(b);
}
Father* operator+(Father* other) {
//此处如何书写？
}

private:
int *a= nullptr;
int *b= nullptr;
};

int main() {
Father* son1 = new Son(1, 2);//图形1
Father* son2 = new Son(3, 4);//图形2
auto son3=son1+
son2 ; //报错，无法实现
}

Answer 1

class Father
{
public:
virtual Father* operator+(Father*) = 0;
};

class Son:public Father
{
public:
Son(int a, int b) {
this->a= new int(a);
this->b= new int(b);
}
Father* operator+(Father* other) {
    Son *p = (Son*)other;
   *a += *(p->a);
   *b += *(p->b);
   return this;
}

private:
int *a;
int *b;
};

int main() {
Father* son1 = new Son(1, 2);//图形1
Father* son2 = new Son(3, 4);//图形2
auto son3=*son1+son2 ; 
return 0;
}