数据结构进制转换

#define STACK_INIT_SIZE 100
#define STACKINCREMENT 10
#define OK 1
#define OVERFLOW -1
#define ERROR 0
typedef struct{    int *base;
                   int *top;
                   int stacksize;
}sqstack;
int initstack(sqstack *s)
{
   s->base=(int *)malloc(STACK_INIT_SIZE*sizeof(int));
   s->top=s->base;
   s->stacksize=STACK_INIT_SIZE;
   return OK;
}

void  pop(sqstack *s,int *e)
{
   if(s->top==s->base)return ERROR;
    *e=*(--s->top);
}
void 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(OVERFLOW);
      s->top=s->base+s->stacksize;
      s->stacksize+=STACKINCREMENT;