file in C++

This is an example write/read a file.
```
#include <iostream>
#include <fstream>
using namespace std;

int main() {
  ofstream ofile("example.txt");
  if(ofile.is_open()){
    ofile << "Writing this line to a file\n";
    ofile << "Writing another line to a file\n";
    ofile.close();
  }

  ifstream ifile("example.txt");
  string line;
  if(ifile.is_open()) {
    while(getline(ifile, line)) {
      cout << line << endl;
    }
    ifile.close();
  }
  return 0;
}
```