difftime


function
<ctime>
double difftime ( time_t time2, time_t time1 );

Return difference between two times

Calculates the difference in seconds between time1 and time2.

Parameters

time2
time_t object representing the latter of the two times.
time1
time_t object representing the earlier of the two times.


Return Value

The difference in seconds (time2-time1) as a floating point double.

Example

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/* difftime example */
#include <stdio.h>
#include <time.h>

int main ()
{
  time_t start,end;
  char szInput [256];
  double dif;

  time (&start);
  printf ("Please, enter your name: ");
  gets (szInput);
  time (&end);
  dif = difftime (end,start);
  printf ("Hi %s.\n", szInput);
  printf ("It took you %.2lf seconds to type your name.\n", dif );
 
  return 0;
}


Output:

Please, enter your name: Juan Soulie
Hi Juan Soulie.
It took you 3.00 seconds to type your name.


See also

asctime Convert tm structure to string (function)
gmtime Convert time_t to tm as UTC time (function)
localtime Convert time_t to tm as local time (function)
time Get current time (function)