如下程序执行后的输出结果是【】。include using namespace std; class Base { public:

如下程序执行后的输出结果是【 】。

include ＜iostream＞

using namespace std;

class Base

{

public:

Base(int x,int y)

{

a=x;

b=y;

}

void Show()

{

cout＜＜"Base: "＜＜a＜＜ ',' ＜＜b＜＜" ";

}

private:

int a,b;

};

class Derived : public Base

{

public:

Derived(int x, int y, int z) : Base(x,y),c(z) { }

void Show()

{

cout＜＜"Derived:"＜＜c＜＜end1;

}

private:

int c;

};

int main()

{

Base b(100,100),*pb;

Derived d(10,20,30);

pb=&b;

pb-＞Show();

pb=&d;

pb-＞Show();

return 0;

}