#include <stdio.h>
 int main()
 {
     int i, j, n, m;                                       
    int a[16] =
     {
         0
     };                                             
     clrscr();                                         
     printf("please input the decimalism number(0~32767):\n");     
     scanf("%d", &n);                                    
    for (m = 0; m < 15; m++)                           
    {
         i = n % 2;                                    
        j = n / 2;                                      
         n = j;                                         
         a[m] = i;
     }
     for (m = 15; m >= 0; m--)
     {
         printf("%d", a[m]);                                 
         if (m % 4 == 0)
             printf(" ");                                 
     }
 }

  clrscr();