笔试题using namespace std

笔试题（using namespace std）

using namespace std;

class A
{
protected:
int m_data;
public:
A(int data = 0){m_data = data; }
int GetData(){return doGetData();}
virtual int doGetData(){ return m_data;}
};

class B:public A
{
protected:
int m_data;
public:
B(int data = 1){m_data = data; }

int doGetData(){ return m_data;}
};

class C:public B
{
protected:
int m_data;
public:
C(int data = 2){m_data = data; }
};

int main()
{
C c(10);

cout< cout< cout< cout< cout< cout< cout< cout<

system("PAUSE");

return 0;
}

///////////////////////////////////////////////////////
运行的结果是
1
1
1
1
1
0
1
1