数据结构与算法李春葆系列之二叉树设计性实验

#include<stdio.h>
#include<stdlib.h>
#include <string.h>
#include<algorithm>
#define MaxSize  100
using namespace std;
typedef struct node
{
	char data;
	struct node * lchild;
	struct node * rchild;
}BTNode;
typedef struct
{
	BTNode *data[MaxSize];
	int front,rear;
}SqQueue;
typedef struct
{
	BTNode *data[MaxSize];
	int top;
}SqStack;
void InitStack(SqStack *&s)
{
	s=(SqStack *)malloc(sizeof(SqStack));
	s->top=-1;
} 
void InitQueue(SqQueue *&q)
{	q=(SqQueue *)malloc (sizeof(SqQueue));
	q->front=q->rear=0;
}

void DestroyStack(SqStack *&s)
{
	free(s);
}
bool StackEmpty(SqStack *s)
{
	return(s->top==-1);
}
bool Push(SqStack *&s,BTNode * e)
{
	if (s->top==MaxSize-1)    
		return false;
	s->top++;
	s->data[s->top]=e;
	return true;
}
bool QueueEmpty(SqQueue *q)
{
	return(q->front==q->rear);
}
bool enQueue(SqQueue *&q,BTNode * e)
{	if ((q->rear+1)%MaxSize==q->front)	
		return false;
	q->rear=(q->rear+1)%MaxSize;
	q->data[q->rear]=e;
	return true;
}
bool deQueue(SqQueue *&q,BTNode *&e)
{	if (q->front==q->rear)	
		return false;
	q->front=(q->front+1)%MaxSize;
	e=q->data[q->front];
	return true;
}
bool Pop(SqStack *&s,BTNode * &e)
{
	if (s->top==-1)		
		return false;
	e=s->data[s->top];
	s->top--;

	return true;
}  
bool GetTop(SqStack *s,BTNode *&e)
{
	if (s->top==-1) 		
		return false;
	e=s->data[s->top];
	return true;
}
void CreateBTree(BTNode *&b,char *str)
{
	BTNode *St[MaxSize],*p;
	int top=-1,k,j=0;
	char ch;
	b=NULL;
	ch=str[j];
	while(ch!='')
	{
		switch(ch)
		{
			case'(':
					top++;
					St[top]=p;
					k=1;
					break;
			case')':
					top--;
					break;
			case',':
					k=2;
					break;
			default:
					p=(BTNode *)malloc(sizeof(BTNode));
					p->data = ch;
            		p->lchild = p->rchild = NULL;
			if(b==NULL)
			{
				b=p;
			}
			else
			{
				switch(k)
				{
					case 1:St[top]->lchild=p;break;
					case 2:St[top]->rchild=p;break;
				}
			}
		}
		j++;
		ch=str[j];
	}
}

int InOrderFX(BTNode *b)  
{
	BTNode *p;
	int count=0;
	SqStack *st;
	InitStack(st);
	p=b;
	while(!StackEmpty(st) || p!=NULL)
	{
		while(p!=NULL)
		{
			Push(st,p);
			p=p->lchild;
		}
		if(!StackEmpty(st))
		{
			Pop(st,p);
			count++; 
			p=p->rchild;
		}
	}
	DestroyStack(st);
	return count;
}
int constcount1=0;
int  DispLeaf(BTNode  *b)
{  
	if(b!=NULL)
	{
		if(b->lchild==NULL&&b->rchild==NULL)
		{
			constcount1++;
		}
		DispLeaf(b->lchild);
		DispLeaf(b->rchild);
	}
}
int L=1;
void findlevel(BTNode *p,char x)
{   
    if(p!=NULL)
    {
      if(p->data==x) printf("层号:%d
",L);
      ++L;
      findlevel(p->lchild,x);
      findlevel(p->rchild,x);
      --L;
    }
}
int deepth = 0; 
int width[10] = {0};
void TreeWidth(BTNode *t){
    if (t == NULL) {
        return;
    }
    if (deepth == 0) {
        width[0] = 1;
    }
    if (t->lchild != NULL) {
        width[deepth+1] += 1;
        deepth += 1;
        TreeWidth(t->lchild);
    }
    if (t->rchild != NULL) {
        width[deepth+1] += 1;
        deepth+=1;
        TreeWidth(t->rchild);
    }
    deepth-=1;
}

void DestroyBTree(BTNode *& b)
{
	if(b!=NULL)
	{
		DestroyBTree(b->lchild);
		DestroyBTree(b->rchild);
		free(b);
	}
 } 

int main()
{   
    BTNode *b;
    char x;
    int h;
	CreateBTree(b,"A(B(D,E(H(J,K(L,M(,N))))),C(F,G(,I)))");
	printf("结点个数为%d
",InOrderFX(b));
	DispLeaf(b);
	scanf("%c",&x);
	findlevel(b,x);
	printf("叶子结点个数是%d
",constcount1);
	TreeWidth(b);
	int max; 
	for(int i=0;i<9;i++)
	{
		if(width[i]>max)
		{
			max=width[i];
		}
	}
	printf("最大宽度是%d
",max); 
	DestroyBTree(b);
	return 0;
	
}