#include <stdio.h> 
#include <process.h> 
#include <dos.h> 

int main(void) 
{ 
   struct date reset; 
   struct date save_date; 

   getdate(&save_date); 
   printf("Original date:\n"); 
   system("date"); 

   reset.da_year = 2001; 
   reset.da_day = 1; 
   reset.da_mon = 1; 
   setdate(&reset); 

   printf("Date after setting:\n"); 
   system("date"); 

   setdate(&save_date); 
   printf("Back to original date:\n"); 
   system("date"); 

   return 0; 
}