#include <stdio.h>
#include <time.h>  /* for clock_t and clock(void) */

int main(void)
{
  clock_t ct1;

  printf("CLOCKS_PER_SEC= %ld  ...press enter to stop time \n", CLOCKS_PER_SEC );
  ct1 = clock() ;
  getchar();

  ct1 = ( clock() - ct1);
  printf("ct1= %.3f \n", (ct1 / (double)CLOCKS_PER_SEC) );

  return 0;
}

#include <stdio.h>
#include <time.h>  /* for clock_t and clock(void) */

int main(void)
{
  clock_t ct1;

  printf("CLOCKS_PER_SEC= %ld ...wait for it! (press enter) ",
                   CLOCKS_PER_SEC );
  ct1 = clock() ;
  
  getchar();
  printf("ct1= %ld    ", (ct1 / CLOCKS_PER_SEC) );
  printf("clock()= %ld   ", clock() );
  printf("clock()= %ld \n", clock()/CLOCKS_PER_SEC  );
  return 0;
} 

/* 

In fc6 I get this:
CLOCKS_PER_SEC= 1000000 ...wait for it! (press enter) 
ct1= 0    clock()= 0   clock()= 0

In mingw I get this:
clock_t_x2.exe
CLOCKS_PER_SEC= 1000 ...wait for it! (press enter)
ct1= 0    clock()= 7630    clock()= 7
*/

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

int main(void)
{
  clock_t ct1, ct2;
  int i;

  ct1 = clock();
  /* use loop instead of a getchar() to let time pass */
  for(i= 1; i > 0; i++)
  ;
  ct2 = clock();

  printf("maximum values of int on this machine are: %d and %d  \n ", i, i-1);
  printf("    ...and it took %ld ticks to count that high! \n", ct2 - ct1 );
  printf("Which is %.4f seconds.\n", ((ct2 - ct1) / (double)CLOCKS_PER_SEC) );

  return 0;
}
/* based on acm.uiuc.edu example which finally got a value to print in fc6! 
   so it would appear that a linux process sleeps or something at getchar(); 
   and on a MS machine it stays awake.   So my original trials were not 
   taking enough process time to show any elapsed time! ha!
*/