difftime

Header File

time.h

Category

Time and Date Routines

Prototype

double difftime(time_t time2, time_t time1);

Description

Computes the difference between two times.

difftime calculates the elapsed time in seconds, from time1 to time2.

Return Value

difftime returns the result of its calculation as a double.

Example

Copy Code

#include <time.h>
#include <stdio.h>
#include <dos.h>
#include <conio.h>
int main(void)
{
   time_t first, second;
   clrscr();
   first = time(NULL);  /* Gets system
                           time */
   delay(2000);         /* Waits 2 secs */
   second = time(NULL); /* Gets system time
                           again */
   printf("The difference is: %f seconds\n",difftime(second,first));
   getch();
   return 0;
}

Portability

POSIX	Win32	ANSI C	ANSI C++
+	+	+	+

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