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 }