#include
using namespace std;
class base {
protected:
int i, j; //protected fields: private to base, but accessible by derived
public:
void set(int a, int b) {
i=a;
j=b;
}
void show() {
cout << i << " " << j << "\n";
}
};
class derived : public base {
int k;
public:
void setk() {
k=i*j;
}
void showk() {
cout << k << "\n";
}
};
int main()
{
derived ob;
ob.set(2, 3);
ob.show();
ob.setk();
ob.showk();
return 0;
}
2 3
6