Mega Code Archive
Virtual base classes
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#include <iostream>
using namespace std;
class base {
public:
int i;
};
// derived1 inherits base as virtual.
class derived1 : virtual public base {
public:
int j;
};
// derived2 inherits base as virtual.
class derived2 : virtual public base {
public:
int k;
};
class derived3 : public derived1, public derived2 {
public:
int sum;
};
int main()
{
derived3 ob;
ob.i = 10; // now unambiguous
ob.j = 20;
ob.k = 30;
// unambiguous
ob.sum = ob.i + ob.j + ob.k;
// unambiguous
cout << ob.i << " ";
cout << ob.j << " " << ob.k << " ";
cout << ob.sum;
return 0;
}
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