二叉树的层次遍历和其深度

//二叉树的层次遍历和其深度
#include <cstdio>
#include <cstdlib>
//define _OJ_
#define maxsize 100
typedef struct tree1
{
    char data;
    struct tree1 *lchild;
    struct tree1 *rchild;
} tree1, *tree;

typedef struct queue1
{
    tree data;
    struct queue1 *next;
} queue1, *queue;

typedef struct Linkqueue1
{
    queue front;
    queue rear;
}Linkqueue1, *Linkqueue;

Linkqueue
init_queue(void)
{
    Linkqueue q;
    q = (Linkqueue) malloc (sizeof(Linkqueue1));
    q->front = q->rear = (queue) malloc (sizeof(queue1));
    q->front->next = NULL;
    return q;
}

void
Enqueue(Linkqueue q, tree T)
//将新的节点插入队尾
{
    queue p;
    p = (queue) malloc (sizeof(queue1));
    p->data = T;    p->next = NULL;
    q->rear->next = p;
    q->rear = p;
}

tree
Dequeue(Linkqueue q)
//从队头删除节点
{
    queue p;
    p = q->front->next;
    q->front->next = p->next;
    if(q->rear == p)    q->rear = q->front;
    return p->data;
}

tree
creat_tree(tree T)
{
    char ch;
    scanf("%c", &ch);
    if(ch == ‘#‘)
        T = NULL;
    else
    {
        T = (tree) malloc (sizeof(tree1));
        T->data = ch;
        T->lchild = creat_tree(T->lchild);
        T->rchild = creat_tree(T->rchild);
    }
    return T;
}

int
isempty(Linkqueue q)
{
    if(q->front == q->rear)
        return 1;
    else
        return 0;
}

void
travertree(tree T)
{
    Linkqueue q;
    tree T2;
    q = init_queue();

Enqueue(q,T);
    while ( !isempty(q)) {
        T2 = Dequeue(q);
        printf("%c\n", T2->data);
        if(T2->lchild != NULL)
             Enqueue(q,T2->lchild);
         if(T2->rchild != NULL)
             Enqueue(q,T2->rchild);
    }
}

int
deep(tree T)
{
    int dept = 0;
    if(T)
    {
        int lchild_deep, rchild_deep;
        lchild_deep = deep(T->lchild);
        rchild_deep = deep(T->rchild);
        dept = lchild_deep >= rchild_deep ? (lchild_deep + 1) : (rchild_deep + 1);
    }
    return dept;
}

int main(int argc, char const *argv[]) {
#ifndef _OJ_  //ONLINE_JUDGE
    freopen("input.txt", "r", stdin);
#endif
    tree T;
    T = creat_tree(T);
    printf("deep == %d\n", deep(T));
    travertree(T);
    return 0;
}

/*deep == 3
A
B
C
D*/