#include<iostream>
using namespace std;
class a
{
public:
a(int i=10)
{
x=i;cout<<"a:"<<x<<endl;
}
int x;
};
class b:public a
{
b(int i):A(i)
{
x=i;cout<<"b:"<<x<<","<<a::x<<endl;
}
private:
a A;
int x;
};
void main()
{
b B(5);
}