erronous user input prevention

I am trying to foolproof a programme i have written and i was just wondering if there is any call from any library that would allow me to stop or detect if a user has entered a different data type than the one specified.
Any help would be greatly appreciated!!

coverd alot, search the boards.

in any event what type are u taking in?

if you want the user to input a letter say 'y' or 'n' for yes or no, you could do something like this:

Code:

---

while (chrOption != 'y' || chrOption != 'n')
{
  cout << "\"'y\" for yes or \"n\" for no\n";
  cin >> chrOption;

  if (chrOption != 'y' || chrOption != 'n')
      cout << "Please use only \"y\" or \"n\",\n";
}

---

I hope that works.

Do you mean stuff like

double user;
cin >> user;

user enters "asdf";

assert(cin.good()); will abort the program.

if(cin.fail()) // rdstate(), good(), eof() bad() etc
{
cin.clear();
cin.ignore(80, '\n');
}

or similar will try to recover from the error if you're using loops.