#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(" ");                                 
    }
}