代码可运行，但运行结果有问题，为什么呢？我觉得代码本身没问题的

为什么这个代码的运行结果是这样，哪里出错了吗？？

#include<stdio.h>
#include<stdlib.h>
#define STACK_INIT_SIZE 100
#define STACKINCREMENT 10
typedef struct {
	int *base;
	int *top;
	int stacksize;
}SqStack;
//构造空栈 
int initstack (SqStack *s)
{
s->base=(int *)malloc(STACK_INIT_SIZE*sizeof(int));
if(!s->base)
exit(0);
s->top=s->base;
s->stacksize=STACK_INIT_SIZE;
return 0;
}
int push(SqStack *s,int e) 
{
	if((s->top-s->base)>=s->stacksize){
		s->base=(int*)realloc(s->base,(s->stacksize+STACKINCREMENT)*sizeof(int));
		if(!(s->base))
		exit(1);
		s->top=s->base+s->stacksize;
		s->stacksize+=STACKINCREMENT;
	}
	*s->top++=e;
	return 0; 
}
int stackempty(SqStack *s){
	if(s->top==s->base)
	return 1;
	else return 0;
}
int pop(SqStack *s,int *e){
	if(s->top==s->base)
	return 1;
	*e=*--s->top;
	return 0;
}
void conversion (int n)
{
	SqStack s;
	int e;
	initstack(&s);
	printf("请输入一个十进制数：");
	scanf("%d",&n) ;
	while (n){
		push(&s,n%8);
		n=n/8;
	}
	printf("该数转换成八进制数为：");
	while(!stackempty(&s)) {
		pop(&s,&e);
		printf("%d",e);
	}
}
int main()
{
	int n;
	SqStack *s;
	initstack(s);
	conversion(n);
	return 0;
}

原代码在这儿