#include <stdio.h>
#include <stdlib.h>
#include <time.h>
 
#define SIZE 50
 
int rand_number(void);
int is_valid(int number);
 
int main(void)
{
   int i, a[SIZE];
 
   srand(time(NULL));
 
   for (i = 0; i < SIZE; i++)
      while (!is_valid(a[i] = rand_number()))
         ;
   for (i = 0; i < SIZE; i++)
      printf("%d ", a[i]);
   putchar('\n');
 
   return 0;
}
/*****************************************************************
1000 ile 9999 arasinda rasgele sayi ureten fonksiyon
*****************************************************************/
int rand_number(void)
{
   return rand() % 9000 + 1000;
}
/****************************************************************
kendisine gonderilen sayinin kosula uygun, basamaklari tekrar
etmeyen bir sayi olup olmadigini test eden fonksiyon. uygunsa 1
degilse 0 degirini uretiyor.
*****************************************************************/
int is_valid(int number)
{
   int temp, i, j;
 
   for (i = 0; i < 10; i++) {
      j = 0;
      temp = number;
      while (temp > 0) {
         if (temp % 10 == i)
            j++;
         if (j > 1)
            return 0;
         temp /= 10;
      }
   }
   return 1;
}