两栈共享空间的插入

//插入元素e为新的栈顶元素
Status Push(SqdoubleStack *S,SElemType e,  int stackNumber)
{
if (S->top+1==s->top2)
return ERROR;
if (StackNumber==1)
S->date[++S->top1]=e;
else if (StackNumber==2)
S->date[- -S->top2]=e;
return ok;
}