(advanced) file i/o

  #include <iostream>
  #include <fstream>
 #include <string>
  using namespace std;
  
  int main(int argc, char* argv[])
  {
  	if (argc != 2)
  	{
 		cout << "ERROR: wrong input! You need to give me a file to open (remember, if there are backslashes \\ use forward slashes / or double backslashes \\\\, and if there are spaces quote the whole thing. Press enter to exit." << endl;
  		cin.get();
  		return 0;
  	}
  	
  	ifstream in_file(argv[1]);
  	if (in_file.bad())
  	{
  		cout << "Sorry, could not open file. Press enter to exit." << endl;
  		cin.get();
  		return 0;
  	}
  	string txt_from_file = "";
  	getline(in_file, txt_from_file);
  	cout << "In " << argv[1] << " was: " << txt_from_file << endl;
  	in_file.close();
  	
  	ofstream out_file(argv[1]);
  	if (out_file.bad())
  	{
  		cout << "Sorry, could not open file. Press enter to exit." << endl;
  		cin.get();
  		return 0;
  	}
  	string txt_to_go_into_file = "";
  	cout << "Gimme some stuff to put into " << argv[1] << ": ";
  	getline(cin, txt_to_go_into_file);
  	out_file << txt_to_go_into_file;
  	out_file.close();
  	
  	return 0;
  }