#include <iostream.h>         // Include the input/output library header,
                              //   to be able to use "cin", "cout"

/* f( n )
 * return 3n^2 + 4n + 2
 */
int f( int n ) {             // A function which takes int n, returns an int.
  int result = 3*n*n + 4*n + 2;
  return result;             // You have to "return" explicitly.
  }


int main() {                 // Every program needs one function named "main"
  cout << "f at 7 is " << f(7) << "." << endl;
                             // Nothing prints by iteslf; endl is a newline.

  return 0;                  /* Return a value...to where?  Who called main?
                                Always return 0 from main, to UNIX. */
  }