#include <stdio.h>
 #include <stdlib.h>
 typedef struct
 {
      int *Top;
      int *Bottom;
 } Stack;
   int  Initstack(Stack *s)
 {   

      s->Top=(int *)malloc(sizeof((int *)100));
      s->Bottom=s->Top;
 }
 int push(Stack *s,int n)
 {
      *s->Top=n;
      s->Top++;}
 }
 int Pop(Stack *s,int e)
     {
         
     if(s->Top!==s->Bottom)
      s->Top--;
      e=*s->Top;}
      return e;
      
 }
 main()
 {
      Stack s;
      int n,e;
      printf("请输入一个正整数：");
      scanf("%d",&n);
      while(n!=0)
      {
           push(s,n%8);
          n=n/8;
      }   
      while(s->Top!=s->Bottom)
      {
          e=Pop(s,e);
          printf("%3d",e);
      }
      printf("\n");

 }