Snippet for text file reading in C++

// reading a text file
#include < iostream >
#include < fstream >
#include < string >
using namespace std;

int main () {
  string line;
  ifstream myfile ("example.txt");
  if (myfile.is_open()) {
    while (myfile.good()){
      getline (myfile,line);
      cout << line << endl;
    }
    myfile.close();
  }

  else cout << "Unable to open file"; 

  return 0;
}