![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-53/ti_inject-812ce.png)
有如下程序: #include using namespace std; class AA{ int k: protected: int n; void setK(int k){mis->k=k;}. public: void setN(int n){tllis->n=n;} }; class BB:public AA{/*类体略*/}; int main(){ BB X; x.n=l: //1 x.setN(2); //2 x.k=3: ///3 X.setK(4); //4 return 0; } 在标注号码的4条语句中正确的是