#include <iostream>
using namespace std;
class BaseClass {
int i;
public:
BaseClass(int n) {
cout << "Constructing base class\n";
i = n;
}
~BaseClass() {
cout << "Destructing base class\n";
}
void showi() {
cout << i << '\n';
}
};
class DerivedClass : public BaseClass {
int j;
public:
DerivedClass(int n, int m) : BaseClass(m) {
cout << "Constructing DerivedClass class\n";
j = n;
}
~DerivedClass() {
cout << "Destructing DerivedClass class\n";
}
void showj() {
cout << j << '\n';
}
};
int main()
{
DerivedClass o(10, 20);
o.showi();
o.showj();
return 0;
}
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