下列程序的输出结果为2,横线处应添加语句( )。 #include<iostream> using namespace std; { public: ______void fun(){cout<<1;} }; class TestClass2:public TestClass1 { public:void fun(){cout<<2;) }; int main() { TestClass1 *p=new TestClass2; p->fun(); delete p; Teturn 0; }
A.public
B.private
C.virtual
D.protected