Read & Write in File in C++

 #include<bits/stdc++.h>

using namespace std;

int main()

{

    // Read data from file

    string b;

    ifstream as("Ok.txt");

    while (as.eof()==0){

        getline(as, b);

        cout<<b<<endl;

    }

          // It will write "Ok brother " in Ok.txt file

         

//   ifstream in("Ok.txt");

//  ofstream mk("Ok.txt");

//  mk<<"Ok brother";

//  cout<<"\nWriting successfully! \n";

//  getline(in,a);   

    return 0;

}