Get the elapsed time: clock and CLOCKS_PER_SEC

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

int main(void)
{
  printf("Elapsed time: %u secs.\n", clock()/CLOCKS_PER_SEC);


  return 0;
}

1.	Getting the time as a string
2.	Getting date data with ease
3.	Display a date
4.	Get time: now
5.	Print local and UTC time
6.	Make time: hour, minute, second, year, day, month
7.	Create local time from time()
8.	How to get local time: localtime and asctime
9.	Get time: how to use time() and time_t
10.	How to check the performance: difftime
11.	Local time and Coordinated Universal Time and date
12.	converts earth days into Jovian years
13.	Convert tm structure to string: how to use asctime
14.	Return number of clock ticks since process start
15.	Convert time_t value to string: how to use ctime
16.	Return difference between two times: how to use difftime
17.	Convert time_t value to tm structure as UTC time: how to use gmtime
18.	Convert time_t value to tm structure in local time: How to use localtime
19.	Convert tm structure to time_t value: how to use mktime
20.	Get current time: how to use time and time_t

Get the elapsed time: clock and CLOCKS_PER_SEC : Time Date « Development « C / ANSI-C