clock

 NAME
  clock - return system clock value

 SYNOPSIS
  clock_t clk = clock(void);

 FUNCTION
  clock() returns the system clock in ticks.  To obtain seconds from
  ticks divide the returned value by CLK_TCK in <time.h>

 EXAMPLE
  #include <stdio.h>
  #include <time.h>

  main()
  {
      clock_t clk = clock();
      long i;

      clk = clk + CLK_TCK;
      for (i = 0; clk - clock() > 0; ++i);
      printf("The FOR loop calling clock() took %d loops in one secondn", i);
      return(0);
  }

 INPUTS
  none

 RESULTS
  clock_t clk;        system clock time value

 SEE ALSO
  time, localtime, asctime, strftime, ctime