difftime

Computes the difference between two times.

Defined in header <time.h>

Syntax

#include <time.h>
double  difftime(time_t time!, time_t timel);

Portability

Remarks

difftime calculates the elapsed time in seconds, from timel to time!.

Return value

difftime returns the result of its calculation as a double.

See also

• asctime
• ctime
• daylight
• gmtime
• localtime
• time
• timezone

Example

#include <time.h>
#include <stdio.h>
#include <dos.h>
#include <conio.h>
int main(void)
{
   time_t first, second;
   clrscrO ;
   first = time(NULL);         /* gets system time  */
   delay(2000);                /* waits 2000 millisecs or  2 sees */
   second = time(NULL);        /* gets system time again  */
   printfC'The difference is: %f seconds\n" ,difftime(second,first));
   getchO ;
   return 0;

Differences from modern implementations

Nothing recorded yet.

Modern references

• cppreference (search)
• POSIX (search)
• Microsoft C runtime (search)

These are search links, not yet checked by hand.

Stable link: /3.1/time.h/difftime/ · short form /3.1/difftime/