Difftime Function

Syntax:

   difftime(time_t time2, time_t time1);

Example:

 #include <time.h>

  #include <stdio.h>



  int main()

  {

    time_t begin, end;

    volatile long unsigned t;

    begin = time(NULL);

    for(t=0;t<700; t++) ;

    end = time(NULL);

    printf("Loop used %f seconds.\n", difftime(end, begin));



    return 0;

  }