h0805.c

141个C语言经典小程序

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

int main(void)
{
   time_t first, second;

   clrscr();
   
   /* Gets system time */
   first = time(NULL);  

   /* Waits 2 secs */
   delay(2000);

   /* Gets system time again */
   second = time(NULL);

   printf("The difference is: %f seconds\n",difftime(second,first));
   getch();

   return 0;
}