有如下程序: #include<iostream> using namespace std class Base { protected: in i public: int j } class Derived:public Base { int m; public:int n; } int main() { Derived d d.i=0 //[1] d.j=0 //[2] d.m=0 //[3] d.n=0 //[4] retum 0 } 其中主函数中有两个赋值语句有错,这两个借误的赋值语句是