virtual base class C++ program to display the sum of the series

Write a program in C++ to display the sum of the series by using the virtual base class.

C++ program to find sum of series by using the virtual base class. summation c++ by using the virtual base class.

different series programs in c++ by using the virtual base class.

c++ calculate series by using the virtual base class. Sum c++ by using the virtual base class.

C++ loop sum numbers by using the virtual base class. C++ program to calculate sum of 10 numbers by using the virtual base class.

#include<iostream>
using namespace std;
class A
{
	public:
	int n;
};
class B:virtual public A
{
	public:
				int i;
		
};
class C:virtual public A
{
	public:
	int k;
};
class D:public B,public C
{
	public:
		int sum;
	public:
		t4tutorials()
		{
			cout<<"enter any number";
			cin>>n;
			k=9;
			for(i=1;i<=5;i++)
				{
					sum=sum+k;
					k=k*10+9;
				}
			
			cout<<"series"<<sum<<endl;
		
		
		}
};
int main()
{
	D d;
	d.t4tutorials();
}

#include<iostream>

using namespace std;

class A

{

public:

int n;

};

class B:virtual public A

{

public:

int i;

};

class C:virtual public A

{

public:

int k;

};

class D:public B,public C

{

public:

int sum;

public:

t4tutorials()

{

cout<<"enter any number";

cin>>n;

k=9;

for(i=1;i<=5;i++)

{

sum=sum+k;

k=k*10+9;

}

cout<<"series"<<sum<<endl;

}

};

int main()

{

D d;

d.t4tutorials();

}

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