#include <stdio.h>
#include <time.h>
#ifdef __MSDOS__
   #define clrscr() system("cls")
#else
   #define clrscr() printf("\x1B[2J")
#endif

int main()
{
 time_t t;
 time(&t);
 while(1)
    {
       clrscr();
       printf("%ld\n",t);
       printf("Mit <STRG><C> beenden!! ");
       time(&t);
    }
 return 0;
}