#include <iostream>

using namespace std;

class A
{
public:
A(int a=1, int b=1, int c=1) : _a(a), _b(b), _c(c) {}
void print()
{ cout << _a << "," << _b << "," << _c << endl; }
private:
int _a, _b, _c;
};

class B : public virtual A
{
public:
B(int a=1, int b=1, int c=1) : A(a, b, c) {}
};

class C : public virtual B
{
public:
C(int a=1, int b=1, int c=1)
:
B(a, b, c),
A(2,2,2) // I can explicitly initialize A here and override the default values
{}
};

main()
{
C c;
c.print();
}