function to prompt user to continue entering data or not

how would i begin writing a function that prompts the user to 'Continue entering data (Y/N)? ' it's supposed to keep asking the user until they enter one of the following characters: 'Y', 'y', 'N', or 'n'. my professor suggested a function like bool want_to_continue but i don't understand how it works. thanks. Mark.

Do you mean ask 'Continue entering data(Y/N)?' over and over or just stay with the same question on the same line until a correct entry is recieved?

Code:

---

#include <iostream>

using std::cout;
using std::cin;

bool ContinueYN();  // Prototype

int main()
{
  bool data;

  data = ContinueYN();

  if(data)
      cout << "Good job: YES";
  else
      cout << "OK: NO";

  return 0;

}

bool ContinueYN()
{
    char c = ' ';

  while( c != 'y' || c != 'Y' || c != 'n' || c != 'N' )
  {
      cout << "Continue? (Y/N): ";       
      cin.get(c);                          // Get character from user
      cin.ignore(1, '\n');        // Skip newline

      if( c == 'y' || c == 'Y' )
        return true;
      else if( c == 'n' || c == 'N' )
        return false;
  }

        return false;        // Will not happen, but is more aesthetically correct

}

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