程序代码：

#include<stdio.h>
#define MAXSIZE 40
struct SStack
{int data[MAXSIZE];
int top;
};
void InitSStack(struct SStack *S)
{
S->top=-1;
}
int PushSStack(struct SStack *S,int x)
{if(S->top==MAXSIZE-1)
{printf("栈满，不能进栈");
return 0;}
else
{S->top++;
S->data[S->top]=x;
return 1;
}
}
int PopSStack(struct SStack*S)
{int x;if(S->top==-1)
{printf("栈空，不能出栈");
return 0;}
else
{x=S->data[S->top];
S->top--;
return x;}
}
void F(int a,struct SStack *S)
{int b;
do
{b=a%8;
PushSStack(S,b);
a=a/8;}while(a);
}
void main()
{int a;struct SStack S;
printf("请输入一个十进制数");
scanf("%d",&a);
F(a,&S);
while(S.top!=0)
printf("%d",PopSStack(&S));
}