填空题
下面程序的打印结果是______。
#include ＜iostream＞
using namespace std;
class Base
public:
Base(int x)
a=x;
void show()
cout＜＜a;
private:
int a;
;
class Derived : public Base
public:
Derived(int i) :Base(i+1) ,b(i)
void show()
cout＜＜b;
private:
int b;
;
int main ( )
Base b(5) , *pb;
Derived d(1);
pb=&d;
pb-＞show();
return 0;
【参考答案】
B