有以下程序
#include ＜iostream＞
using namespace std;
class Base int a;
public:
Base(int x) a=x;
void show() cout＜＜a;
class Derived: public Base int b;
public:
Defived(int i):Base(i+ 1 ),b(i)
void show() cout＜＜b;
;
int main() Base b(5),*pb;
Derived d(1);
pb=&d;
pb-＞show();
return 0;运行后的打印结果是______。