杭电2051

 1 #include<stdio.h>
 2 int main()
 3 {
 4     int n,a[20],i,j;
 5     while(scanf("%d",&n)!=EOF&&n>0)
 6     {
 7         
 8         for(i=0;n/2.0!=0;i++)
 9         {
10             a[i]=n%2;
11             n=n/2;
12         }
13         for(j=i-1;j>=0;j--)
14             printf("%d",a[j]);
15         printf("\n");
16 
17     }
18 }