示例

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

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

void function(Derived *dp){

Base *ptr = (Base *) dp;
ptr->fnc();

}

解决方案

不要将一个类的指针强制转换成指向其父类的指针。

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

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

void function(Derived *dp){

dp->fnc();

}