代码

class a{
public:
    virtual int gao(int a,int b){
        return a%b;
    }
};
class b:public a{
public:
    int gao(int a,int b){
        return a+b;
    }
};
int plus(int x, int y){
    a* p=new b();
    return p->gao(x,y);
}

评测结果