C Language and Libraries Help (clang.hlp) (Table of Contents; Topic list)
clock
 Description Example                     Up Contents Index Back
─────Run-Time Library───────────────────────────────────────────────────────
 
  Include:   <time.h>
 
  Syntax:    clock_t clock( void );
 
  Returns:   the elapsed processor time if successful, or -1 if not.
 
  See also:  difftime, time
                                    -♦-