示例

class Base {
public:
void fnc();
};

class Derived: public Base {
public:
void fnc(){}
};

int main(){
Derived d;

Base *basePtr = &d;
Derived *derivedPtr = &d;

basePtr->fnc();//calls Base::fnc()
derivedPtr->fnc(); //calls Derived::fnc()

return 0;
}

解决方案

不要覆盖非虚函数。更改设计以不使用基类，或使基类函数成为虚函数以确保多态行为。

class Base {
public:
virtual void fnc();
};

class Derived: public Base {
public:
void fnc(){}
};

int main(){
Derived d;

Base *basePtr = &d;
Derived *derivedPtr = &d;

basePtr->fnc();//calls Derived::fnc()
derivedPtr->fnc(); //calls Derived::fnc()

return 0;
}