C++ Program to find the sum of the series using friend function

Write a program in C++ to find the sum of the series using friend function.

#include<iostream>
using namespace std;
class T4TUTORIALS
{
	protected :
		int i,j;
		int s=0;
	public :
		read()
		{
			cout<<"enter the value";
			int n;
			cin>>n;
  int s=0;
	 int t=1,i=1;
	 for(i=1;i<=n;i++)
  {
  	cout<<" "<<t<<" ";
      if (i<n)
      {
      	cout<<"+";    
      }
     s=s+t;
     t=(t*10)+1;
  }
  cout<<endl<<"The Sum is :"<<s;
}
		
		friend int show(T4TUTORIALS);
		
};
int show(T4TUTORIALS a)
{
		cout<<"sum of given input  = "<<a.s;
}
int main()
{
	T4TUTORIALS a;
	a.read();
	show(a);
}