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#include <iostream>
using namespace std;
class BaseClass {
int i;
public:
void setInt(int n);
int getInt();
};
class DerivedClass : public BaseClass {
int j;
public:
void setJ(int n);
int mul();
};
void BaseClass::setInt(int n)
{
i = n;
}
int BaseClass::getInt()
{
return i;
}
void DerivedClass::setJ(int n)
{
j = n;
}
int DerivedClass::mul()
{
return j * getInt();
}
int main()
{
DerivedClass ob;
ob.setInt(10); // load i in BaseClass
ob.setJ(4); // load j in DerivedClass
cout << ob.mul(); // displays 40
return 0;
}
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