用栈实现十进制数转化成八进制数

#include<stdio.h>
#include<stdlib.h>
#define InitSize 100 //代表存储空间的初始分配量
//定义栈的结构体
typedef struct stacks
{
 int * top;
 int * base;
 int stacksize;
}SqStack;

//构造一个空栈
void InitStack(SqStack *s)
{
 s->base = (int *)malloc(InitSize * sizeof(int));
 if(!s->base)  printf("分配失败！");
 
 s->top = s->base;
 s->stacksize = InitSize;
 //printf("建立成功！ ");
}

//入栈函数
void Push(SqStack *s, int e)
{
 if(s->top-s->base>=s->stacksize)
 {
  s->base = (int *)realloc(s->base,(s->stacksize+100)*sizeof(int));
  s->top = s->base +s->stacksize;
  s->stacksize += 100;
 }//printf("栈满！");
 *s->top = e;
 s->top++;
}

//出栈函数
int Pop(SqStack *s, int *p)
{
 int i = 0;
 if(s->top == s->base)  printf("栈为空！");
 else
 {
  while(s->top!=s->base)
  {
   s->top--;
   p[i] = *(s->top);
   i++;
  }
 }
 return i;
}

//转化函数
void Change(int n, SqStack *s, int *sp)
{
 int i, j;
 while(n)
 {
  Push(s, n%8);
  n = n / 8;
 }
  i = Pop(s, sp);
  for(j=0; j<i; j++)
  {
   printf("%d ", *(sp+j));
  }
}
int main()
{
 int n,e[InitSize], *sp;
 SqStack s;
 sp = e;
 InitStack(&s);//这里是将结构体变量的地址作为实参进行传递
 printf("请输入十进制数：");
 scanf("%d", &n);
 printf("转化成八进制数为：");
 Change(n, &s, sp);
 printf(" ");
 return 0;
}