I/O user friendly file name

[farhan15]

Hi I'm new to C++.
I was practicing some programs. And I was wondering for the follwing program,
is it possible to name the output text file on users choice?
like lets say if the user puts his name Luigi, can I make the output text name as "Luigi.txt"?

      string name;
    string fileName;
    int age;
    cout<<"Enter name: ";
    cin >> name;
    cout<<"Enter age: ";
    cin >> age;

    fileName = name+".txt";

    ofstream output;
    output.open(fileName);
    output<<"Name: "<<name
          <<"\nAge: "<<age;



    output.close();

[Duthomhas]

Sure, but you must follow the cardinal rule of user input:

    All user input is terminated when the user presses ENTER

To get any string from the user, use std::getline():

string name;
cout << "Enter your name: ";
getline( cin, name );

To get anything else, make sure you get rid of the trailing newline:

int age;
cout << "Enter your age: ";
cin >> age;
cin.ignore( numeric_limits<streamsize>::max(), '\n' );

You can make that simpler with a function:

template <typename T>
std::istream& inputline( std::istream& ins, T& value )
{
  ins >> value;
  ins.ignore( std::numeric_limits <std::streamsize> ::max(), '\n' );
  return ins;
}

Now you can use it all easily:

int main()
{
  string name;
  cout << "Enter your name: ";
  getline( cin, name );

  int age;
  cout << "Enter your age: ";
  inputline( cin, age );

  string filename;
  cout << "Enter a filename: ";
  getline( cin, filename );
  if (filename.find( ".txt" ) = filename.npos) 
    filename += ".txt";

  ofstream output( filename );
  ...

Hope this helps.