度小满校园招聘笔试题

下列程序中没有语法错误的语句是： #include <iostream> using namespace std; class one { int b; public: void f(){cout<<"one::f()";} protected: void h() {cout<<"one::h()";} }; class two:public one { int d; public: void f2() {cout<<"two::f2()";} protected: void h2() {cout<<"two::h2()";} }; class three:protected two { int e; public: void f3() {cout<<"three::f3()";} protected: void h3() {cout<<"three::h3()";} }; int main() { three T; T.f(); //1 T.h(); //2 T.f2(); //3 T.h2(); //4 T.f3(); //5 T.h3(); //6 return 0; }