Thread: How to 'Clear' a variable?

Hey guys, is there any way you can clear what a variable holds?

For E.G, if I was to write this:

Code:

int x;
x = 10;
cout << x << endl;

What code would go after it so that I can clear the integer 'x' and assign it to another number, such as a user input? I'm hoping to do something like this:

Code:

int pin;
int pin_attempt;
pin = 2011;
   cout << "Enter Pin: ";
   cin.get >> pin_attempt;
   cin.ignore();

if ( pin_attempt == pin )
{
  // Don't really have to bore you with this code.. 
}
else
{
  cout << "Incorrect Pin. Please reset: ";
  // Code to clear the int 'pin' needs to go here?
  cin.get >> pin;
  cin.ignore();
}

I've actually got a gut feeling I've made a fool of myself in the matter that it's probably as easy as just telling the compiler to overwrite it with another user input.. but hey, no point not getting some professional advice

Line 16 is not coded correctly, just realized :P

Great, thanks alot!
I have thought of another question.. heh sorry! :P (I also thought it would be best to re-comment on this seeming as I'm sure it's getting annoying me posting so much!)
is there a way to have a variable accept only certain inputs?

Code:

string mystring;
cout << "Are you sure? (Y/N)" << endl;
cin >> mystring;
cin.ignore();

As an example to what I am talking about, how would you make mystring only accept 'Y' or 'N'? I have a feeling it might have something to do with cin.ignore.. can you ignore everything besides certain chars? because I know you can ignore certain characters, surely there is a way to turn that around and have it only accept certain chars?

Thoughts? Thanks!