执行以下程序后,输出结果第二行的内容是______。
#include<iostream>
using namespace std;
class TestClass
public:
virtual void who()cout<<"Base Class"<<endl;
;
class TestClass1:public TestClass
public:
virtual void who()cout<<"TestClass1 Class"<<endl;
;
class TestClass2:public TestClass
public:
virtual void who()cout<<"TestClass2 Class"<<endl;
;
int main(int argc,char*argv[])
TestClass obj1,*p;
TestClass1 obj2;
TestClass2 obj3;
P=&obj1;p->who();
p=&obj2;p->who();
p=&obj3;p->who();
return 0: