difftime: returns the difference, in seconds, between time1 and time2( time2 - time1) : difftime « time.h « C / ANSI-C

1. C / ANSI-C
2. time.h
3. difftime

difftime: returns the difference, in seconds, between time1 and time2( time2 - time1)

    

//Declaration: double difftime(time_t time2, time_t time1); 
 

    
  

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

  int main(void)
  {
    time_t start, end;
    volatile long unsigned t;

    start = time(NULL);
    for(t=0; t<500; t++) ;
    end = time(NULL);
    printf("Loop used %f seconds.\n", difftime(end, start));

    return 0;
  }

         
/*
Loop used 0.000000 seconds.
*/ 

           
       

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