Progranm to timer function CPU calendar Function

#include 

#include 

#include 

#include 



int main(void)

{

  time_t calendar_start = time(NULL);       /* Initial calendar time    */

  clock_t cpu_start = clock();              /* Initial processor time   */

  int count = 0;                            /* Count of number of loops */

  const int iterations = 1000000;           /* Loop iterations          */

  char answer = 'y';





  printf("Initial clock time = %lu Initial calendar time = %lu\n",

                                     cpu_start, calendar_start);



  while(tolower(answer) == 'y')

  {

    for(int i = 0 ; i    {

      double x = sqrt(3.14159265);

    }

    printf("\n%ld square roots completed.", iterations*(++count));

    printf("\nDo you want to run some more(y or n)? ");



    scanf("\n%c", &answer);

  }



  clock_t cpu_end = clock();                /* Final cpu time           */

  time_t calendar_end = time(NULL);         /* Final calendar time      */



  printf("\nFinal clock time = %lu Final calendar time = %lu\n",

                                                       cpu_end, calendar_end);

  printf("\nCPU time for %ld iterations is %.2lf seconds\n",

                                count*iterations, ((double)(cpu_end-cpu_start))/CLOCKS_PER_SEC );



  printf("\nElapsed calendar time to execute the program is %8.2lf\n",

                                           difftime(calendar_end, calendar_start));

  return 0;

}