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树的各种遍历(c 语言实现)

时间:2017-10-23 20:44:34      阅读:265      评论:0      收藏:0      [点我收藏+]

标签:节点   str   osi   har   int   很多   order   队列   树的遍历   

在实现过程中遇到的一个问题就是我太马虎,总是缺这缺那,对细节没有太多注意导致我一直调试 不过,还无法发现错误,期间多次想放弃,但还是忍住了,最后发现了问题,(该死的非(!);

树的遍历很多包括,先序、中序、后序、层次,其中先中后序都可分两种方式:递归和非递归(我用栈实现),层次我用两种方法:栈和队列;代码如下(第一次发博):

 

 1 //BinTree.c
 2 #include <stdbool.h>
 3 //树节点
 4 struct TreeNode{
 5     char  Num;
 6     struct TreeNode * Left;
 7     struct TreeNode * Right;
 8 };
 9 typedef TreeNode  *BinTree;
10 bool  CreateTree(BinTree *);
11 
12 void PostOrderTraversal(BinTree);
13 void PreOrderTraversal(BinTree);
14 void InOrderTraversal(BinTree);
15 void LevelTaversal(BinTree);
16 int PostOrderGetHeigh(BinTree);
17 
18 //栈节点
19 struct SNode{
20     BinTree BT;    
21     struct SNode *Next;
22 };
23 
24 typedef struct SNode * Stack;
25 
26 Stack CreateStack();
27 bool Push(Stack, BinTree);
28 bool IsEmpty(Stack);
29 BinTree Pop(Stack);
30 bool DestroyStack(Stack);
31 
32 //队列节点
33 struct Node{
34     BinTree BT;
35     struct Node *Next;
36 };
37 typedef struct Node * Position;
38 
39 struct QNode{
40     Position Front;
41     Position Rear;
42 };
43 typedef struct QNode * Queue;
44 
45 Queue CreateQueue();
46 bool AddQ(Queue, BinTree);
47 bool IsEmpty(Queue);
48 BinTree DeleteQ(Queue);
49 bool DestroyQueue(Queue);

 

  1 #include "BinTree.h"
  2 #include <stdio.h>
  3 #include <stdlib.h>
  4 
  5 
  6 
  7 bool CreateTree(BinTree *BT)
  8 {
  9     
 10     
 11     char  ch;
 12     scanf_s("%c ", &ch);
 13 
 14     
 15     if (ch == #){
 16         *BT = NULL;
 17     }
 18     else
 19     {
 20     
 21         (*BT)= (BinTree)malloc(sizeof(struct TreeNode));
 22         if (!BT)
 23             exit(0);
 24         (*BT)->Num = ch;
 25         CreateTree(&(*BT)->Left);
 26         CreateTree(&(*BT)->Right);
 27 
 28     }
 29 
 30     
 31     return true;
 32 }
 33 
 34 void PreOrderTraversal(BinTree BT)
 35 {
 36     //递归实现先序遍历
 37     //if (BT)
 38     //{
 39     //    if (BT->Left == NULL&&BT->Right == NULL)
 40     //        printf("%c ", BT->Num);
 41     //    PreOrderTraversal(BT->Left);
 42     //    PreOrderTraversal(BT->Right);
 43     //}
 44         
 45 
 46     //非递归实现先序遍历
 47     
 48     BinTree T = BT;
 49     Stack S = CreateStack();
 50     while (T || !IsEmpty(S)){
 51         while (T){
 52             printf("%c", T->Num);
 53             Push(S, T);
 54             T = T->Left;
 55         }
 56         if (!IsEmpty(S)){
 57             T = Pop(S);
 58             T = T->Right;
 59         }
 60     }
 61 }
 62 void InOrderTraversal(BinTree BT)
 63 {
 64     //递归实现中序遍历
 65     /*if (BT)
 66     {
 67         InOrderTraversal(BT->Left);
 68         printf("%c", BT->Num);
 69         InOrderTraversal(BT->Right);
 70     }*/
 71 
 72     //非递归实现
 73     BinTree T = BT;
 74     Stack S = CreateStack();
 75     while (T || !IsEmpty(S)){
 76         while (T){
 77             Push(S, T);
 78             T = T->Left;
 79         }
 80         if (!IsEmpty(S)){
 81             T = Pop(S);
 82             printf("%c", T->Num);
 83             T = T->Right;
 84         }
 85     }
 86 }
 87 void PostOrderTraversal(BinTree BT)
 88 {
 89     //递归实现后序遍历
 90     if (BT)
 91     {
 92         PostOrderTraversal(BT->Left);
 93         PostOrderTraversal(BT->Right);
 94         printf("%c", BT->Num);
 95     }
 96 
 97     //非递归实现
 98     //没写
 99 }
100 
101 void LevelTraversal(BinTree BT)
102 {
103     //层次遍历,栈实现
104     /*BinTree T = BT;
105     Stack S = CreateStack();
106     if(!BT)
107        return;
108     Push(S, T);
109     while (!IsEmpty(S)){
110         T = Pop(S);
111         printf("%c", T->Num);
112         if (T->Right != NULL)
113             Push(S, T->Right);
114         if (T->Left != NULL)
115             Push(S, T->Left);
116 
117     }
118     DestroyStack(S);*/
119 
120     //层次遍历,队列实现
121     BinTree T = BT;
122     Queue Q = CreateQueue();
123     if (!T)
124         return;
125     AddQ(Q, T);
126     while (!IsEmpty(Q)){
127         T = DeleteQ(Q);
128         printf("%c", T->Num);
129         if (T->Left != NULL)
130             AddQ(Q, T->Left);
131         if (T->Right != NULL)
132             AddQ(Q, T->Right);
133     }
134     DestroyQueue(Q);
135 
136 }
137 //后序遍历实现树高
138 int PostOrderGetHeight(BinTree BT)
139 {
140     int HL, HR, MaxH;
141     if (BT){
142         HL = PostOrderGetHeight(BT->Left);
143         HR = PostOrderGetHeight(BT->Right);         
144         MaxH = (HL > HR)?HL:HR;       //根最后还要执行一次
145         return (MaxH + 1);
146     }
147 
148     else
149         return 0;
150 }
151 int main()
152 {
153         BinTree BT ;
154         
155         CreateTree(&BT);
156         PreOrderTraversal(BT);
157         printf("\n\n");
158         InOrderTraversal(BT);
159 
160         printf("\n\n");
161         PostOrderTraversal(BT);
162 
163         printf("\n\n");
164         LevelTraversal(BT);
165 
166         
167         putchar(\n);
168         printf("%d", PostOrderGetHeight(BT));
169         system("pause");
170         return 0;
171 
172 }
173 
174     

 

 1 //栈实现
 2 
 3 #include "BinTree.h"
 4 #include <stdio.h>
 5 #include <stdlib.h>
 6 
 7 Stack CreateStack()
 8 {
 9     Stack S;
10     S = (Stack)malloc(sizeof(struct SNode));
11     S->Next = NULL;
12     return S;
13 }
14 
15 bool Push(Stack S,BinTree BT)
16 {
17     Stack tmp;
18     tmp = (Stack)malloc(sizeof(struct SNode));
19     tmp->BT = BT;
20     tmp->Next= S->Next;
21     S->Next = tmp;
22 
23     return true;
24 }
25 bool IsEmpty(Stack S)
26 {
27     return S->Next == NULL;
28 }
29 
30 BinTree Pop(Stack S)
31 {
32     if (IsEmpty(S))
33         exit(0);
34     Stack tmp;
35     BinTree T;
36     tmp = S->Next;
37     S->Next = tmp->Next;
38     T = tmp->BT;
39     free(tmp);
40     return T;
41 }
42 
43 bool DestroyStack(Stack S)
44 {
45     while (!IsEmpty(S))
46         Pop(S);
47     free(S);
48     return true;
49 }

 

 

 1 //队列实现
 2 
 3 #include "BinTree.h"
 4 #include <stdio.h>
 5 #include <stdlib.h>
 6 
 7 Queue CreateQueue()
 8 {
 9     Queue Q;
10     Q = (Queue)malloc(sizeof(struct QNode));
11     Q->Rear=(Position)malloc(sizeof(struct Node));
12     Q->Rear->Next = NULL;
13     Q->Front = Q->Rear;
14     return Q;
15 }
16 
17 bool AddQ(Queue Q, BinTree BT)
18 {
19     Position tmp;
20     tmp = (Position)malloc(sizeof(struct Node));
21     tmp->BT = BT;
22     tmp->Next = NULL;
23     Q->Rear->Next = tmp;
24     Q->Rear = tmp;
25 
26     return  true;
27 }
28 bool IsEmpty(Queue Q)
29 {
30     return Q->Front->Next == NULL;
31 }
32 
33 BinTree DeleteQ(Queue Q)
34 {
35     Position tmp;
36     BinTree BT;
37     tmp = Q->Front->Next;
38     if (Q->Front->Next == Q->Rear)
39         Q->Rear = Q->Front;  //关键 Q->Rrear必须指回头节点
40     Q->Front->Next = tmp->Next;
41     BT = tmp->BT;
42 
43     free(tmp);
44     return BT;
45 }
46 
47 bool DestroyQueue(Queue Q)
48 {
49     if (!IsEmpty(Q)){
50         DeleteQ(Q);
51     }
52     free(Q->Front);
53     Q->Front =Q->Rear= NULL;
54     return true;
55 }

 

第一次写博客,不知道怎么写,就随便写吧,希望坚持吧。

 

树的各种遍历(c 语言实现)

标签:节点   str   osi   har   int   很多   order   队列   树的遍历   

原文地址:http://www.cnblogs.com/hyt-/p/7718721.html

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