题目内容：
#include using namespace std;
class base
{
private:int x;
public:base(int a){x=a;}
int get(){return x;}
void showbase() {cout<<"x="<<><>< strong="">
};
class Derived:public base
{private:int y;
public:Derived(int a,int b):base(a){y=b;}
void showderived()
{cout<<"x="<
};
void main()
{
base b(3);
Derived d(6,7);
b.showbase();
d.showderived();
b=d;
b.showbase();
b1.showbase();
________________________
base* pb=&b1;
pb->showbase();
d.showderived();
b.showbase();
}
输出结果如下：
x=3
x=6，y=7
x=6
x=6
x=6
x=6，y=7
x=6
参考答案：