先序建的树，中序遍历，为啥在Push处会中断运行啊

#include 

#include 

#include 

#define S_SIZE    100

#define STACKINCREMENT  10

typedef struct BiTNode

{

    char     data;

    struct BiTNode   *lchild, *rchild;

}BiTNode,*BiTree;

typedef BiTNode ElemType;

typedef struct

{

    ElemType *base;

    ElemType *top;

    int stacksize;

}SqStack;

BiTree CreateBiTree(BiTree T)

{

    char ch;

    scanf_s("%c",&ch);

    if (ch == ' ')

      T = NULL;

    else

    {

        T = (BiTree)malloc(sizeof(BiTNode));

        T->data = ch;

        T->lchild=CreateBiTree(T->lchild);

        T->rchild=CreateBiTree(T->rchild);

    }

    return T;

}

void InitStack(SqStack *L)

{

    L->base = (ElemType *)malloc(sizeof(S_SIZE * sizeof(char)));

            L->top = L->base;

            L->stacksize = S_SIZE;

    }


void Push(SqStack *L, ElemType *e)

{

    if (L->top - L->base >= L->stacksize)

    {//栈满，追加存储空间

        L->base = (ElemType *)realloc(L->base, (L->stacksize + STACKINCREMENT)*sizeof(ElemType));

        L->top = L->base + L->stacksize;

        L->stacksize += STACKINCREMENT;

    }

    *L->top++= *e;
运行到这会中断


}

void Pop(SqStack *L, ElemType *e)

{

    if (L->top != L->base)

    {

        e = --L->top; 

    }

}

int StackEmpty(SqStack *L)

{

    if (L->top == L->base)

        return 1;

    else

        return 0;

}

int InOrderTraverse(BiTNode *T)

{

    SqStack *L;

    L = (SqStack *)malloc(sizeof(SqStack));

    BiTree p;

    InitStack(L);  p = T;

    while (p || !StackEmpty(L)) 

    {

        if (p) { Push(L, p);  p = p->lchild; }  // 非空指针进栈，继续左进

        else {       // 上层指针退栈，访问其所指结点，再向右进

            Pop(L, p);

            if (!printf("%c",p->data)) return 1 ;

            p = p->rchild;

        }

    }

    return 0;

}

void main()

{

    BiTree T;

    T = (BiTree)malloc(sizeof(BiTNode));

    CreateBiTree(T); 

    InOrderTraverse(T); 

    printf("WSQ");

    getchar();

}

晕这么长，还真不好看。建议楼主学会调试程序，设断点、单步执行等手段。

以后楼主发程序可以用代码段发 还是先学会调试吧