C++ Program to display the sum of the series using classes and objects

Write a program in C++ to display the sum of the series using classes and objects.

#include <iostream>
using namespace std;
class T4Tutorials
{
	public:
		long int num,i,k;
		int sum;
		public:
			int function()
			{
				k=9;
				sum=0;
				cout<<"input the number of terms.";
				cin>>num;
				for(i=1;i<=num;i++)
				{
					sum=sum+k;
					k=k*10+9;
				}
				cout<<"the sum of series is"<<sum;
			}
		};
		int main()
		{
			T4Tutorials obj;
			obj.function();
		}

#include <iostream>

using namespace std;

class T4Tutorials

{

public:

long int num,i,k;

int sum;

public:

int function()

{

k=9;

sum=0;

cout<<"input the number of terms.";

cin>>num;

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

{

sum=sum+k;

k=k*10+9;

}

cout<<"the sum of series is"<<sum;

}

};

int main()

{

T4Tutorials obj;

obj.function();

}

Output

Please input the number of terms. 5

the sum of the series is 111105.

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