open_reopen_ofstream.cpp

#include <fstream>
#include <iostream>

using namespace std;

int main()
{
  cout << "Hello world." << std::endl;
  
  ofstream book("test.txt");
  cout << "First: " << string(book ? "ok":"non ok") << endl;
  cout << "First: " << string(book.is_open() ? "open":"not open") << endl;

//  book.open("test.txt");
//  cout << "Second: " << string(book ? "ok":"non ok") << endl;
//  cout << "Second: " << string(book.is_open() ? "open":"not open") << endl;
  
  book.close();
  cout << "Third: " << string(book ? "ok":"non ok") << endl;
  cout << "Third: "  << string(book.is_open() ? "open":"not open") << endl;
    
  book.open("test.txt");
  cout << "Four: " << string(book ? "ok":"non ok") << endl;
  cout << "Four: " << string(book.is_open() ? "open":"not open") << endl;
  return 0;
}