数据结构大型实验的记录(done)
用平衡二叉树的知识实现用户登录系统模拟
基本思路：
类：AVLnode (树的节点类)
AVLtree (树的基本操作类 包括insert remove search 平衡树的4种旋转)
UserInfo(用户信息类)
决定还是按日期更新 这样更完整一点
12-15
昨天写到12点多，基本写完了AVL类，删除部分还有待完善，之后可能要补充平衡过程。
昨天写完类后想到具体的用户交互过程，想到一个节点里不仅要存用户名还要存密码，然后之前写类的时候一直是当一个nodeValue来写的，写到头昏脑胀有点晕以为要重新写一遍把nodeValue更新到两个了。今天想到了很简单的解决办法，只要在AVLnode类里加一个string password然后在每次insert完后返回insert的节点，再用节点指向它的password就可以了。
初步做了交互界面。
不是数据的问题，insert方法本身就有问题 可能不只是旋转上的错误
apple fhy1118
Apple 1110111
abc ABC4C
Aabc1 **2
cat 890
but happy
flower flower
trees 5678910
flowst 9087
but1 000000
flowar 080808
12-16
尼玛挑了半天旋转 本来没问题的都快被我调成有问题的了。格式也超优化 结果发现是insert里面p往上遍历写错
for(int i=0;i<count-2;i++)
p=newnode->parent;
发现的时候心中真的千万匹草泥马开始奔腾啊！！！！！！
但是成功构建以后很爽！！！！！！！
这尼玛大概就是程序猿的痛并快乐着了吧！！！！！！！！！！
贴上完整代码！！！
1 // AVLnode.h: interface for the AVLnode class. 2 // 3 ////////////////////////////////////////////////////////////////////// 4 5 #if !defined(AFX_AVLNODE_H__C8E651E6_0EA9_4808_848B_0CB927923FAE__INCLUDED_) 6 #define AFX_AVLNODE_H__C8E651E6_0EA9_4808_848B_0CB927923FAE__INCLUDED_ 7 8 #if _MSC_VER > 1000 9 #pragma once 10 #endif // _MSC_VER > 1000 11 #include <stddef.h> 12 #include <string> 13 using namespace std; 14 15 class AVLnode 16 { 17 public: 18 string nodeValue;// node data 19 string password; 20 AVLnode *left, *right, *parent; // child pointers and pointer to the node's parent 21 AVLnode (const string item, AVLnode *lptr=NULL, AVLnode *rptr=NULL, AVLnode *pptr=NULL): 22 nodeValue(item), left(lptr), right(rptr), parent(pptr) 23 {} 24 public: 25 AVLnode(){password="";}; 26 virtual ~AVLnode(){}; 27 28 }; 29 30 #endif // !defined(AFX_AVLNODE_H__C8E651E6_0EA9_4808_848B_0CB927923FAE__INCLUDED_)
1 // AVLtree.h: interface for the AVLtree class. 2 // 3 ////////////////////////////////////////////////////////////////////// 4 5 #if !defined(AFX_AVLTREE_H__36B69688_6A87_4949_A008_13138B14D185__INCLUDED_) 6 #define AFX_AVLTREE_H__36B69688_6A87_4949_A008_13138B14D185__INCLUDED_ 7 8 #if _MSC_VER > 1000 9 #pragma once 10 #endif // _MSC_VER > 1000 11 12 #include "AVLnode.h" 13 #include "tnodeShadow.h" 14 #include <iostream> 15 #include <iomanip> 16 using namespace std; 17 18 class AVLtree 19 { 20 public: 21 AVLtree(); // constructor. initialize root to NULL and size to 0 22 ~AVLtree(); // destructor 23 tnodeShadow *buildShadowTree(AVLnode *t, int level, int& column); 24 25 26 void displayTree(int maxCharacters); 27 void deleteShadowTree(tnodeShadow *t); 28 AVLnode *insert(const string &item); 29 void remove(const string &item); 30 AVLnode *search(const string &item) const; 31 AVLnode *getRoot(); 32 33 private: 34 AVLnode *root; // pointer to tree root 35 int treeSize; // number of elements in the tree 36 AVLnode *creatAVLNode(const string item, AVLnode *lptr, AVLnode *rptr, AVLnode *pptr); 37 38 int depth(AVLnode *p) 39 { 40 int ldep=0,rdep=0,depval; 41 if(p==NULL) 42 depval=-1; 43 else 44 { 45 ldep=depth(p->left); 46 rdep=depth(p->right); 47 depval=1+(ldep>rdep?ldep:rdep); 48 } 49 return depval; 50 }; 51 52 int balanceFactor(AVLnode *cur) 53 { 54 int ldep=0,rdep=0; 55 AVLnode *p=cur; 56 ldep=depth(p->left); 57 rdep=depth(p->right); 58 return (rdep-ldep); 59 }; 60 61 void rightRotate(AVLnode *cur) 62 { 63 //cur is the middle one 64 if(cur->right!=NULL) 65 { 66 cur->parent->left=cur->right; 67 cur->right->parent=cur->parent; 68 } 69 else cur->parent->left=NULL; 70 71 if(cur->parent->parent==NULL) 72 { 73 cur->parent->parent=cur; 74 cur->right=cur->parent; 75 cur->parent=NULL; 76 root=cur; 77 } 78 else 79 { 80 AVLnode *pr=cur->parent->parent; 81 cur->right=cur->parent; 82 cur->parent->parent=cur; 83 84 cur->parent=pr; 85 if(cur->nodeValue>pr->nodeValue) 86 pr->right=cur; 87 else pr->left=cur; 88 } 89 }; 90 91 void leftRotate(AVLnode *cur) 92 { 93 //cur is the middle one 94 if(cur->left!=NULL) 95 { 96 cur->parent->right=cur->left; 97 cur->left->parent=cur->parent; 98 } 99 else cur->parent->right=NULL; 100 101 if(cur->parent->parent==NULL) 102 { 103 cur->parent->parent=cur; 104 cur->left=cur->parent; 105 cur->parent=NULL; 106 root=cur; 107 } 108 else 109 { 110 AVLnode *pr=cur->parent->parent; 111 cur->left=cur->parent; 112 cur->parent->parent=cur; 113 114 cur->parent=pr; 115 if(cur->nodeValue>pr->nodeValue) 116 pr->right=cur; 117 else pr->left=cur; 118 } 119 }; 120 121 void leftrightRotate(AVLnode *cur) 122 { 123 //cur is the third one 124 //全空 125 if(cur->left==NULL&&cur->right==NULL) 126 { 127 cur->parent->right=NULL; 128 cur->parent->parent->left=NULL; 129 } 130 //一边空 另一边最多一个 131 else if(cur->right==NULL) 132 { 133 cur->left->parent=cur->parent; 134 cur->parent->right=cur->left; 135 cur->parent->parent->left=NULL; 136 } 137 else if(cur->left==NULL) 138 { 139 cur->right->parent=cur->parent->parent; 140 cur->parent->parent->left=cur->right; 141 cur->parent->right=NULL; 142 } 143 //非空 挂在一边 另一边最多只有一个元素 144 else 145 { 146 cur->left->parent=cur->parent; 147 cur->parent->right=cur->left; 148 149 cur->right->parent=cur->parent->parent; 150 cur->parent->parent->left=cur->right; 151 152 } 153 AVLnode *pr=cur->parent->parent->parent; 154 155 cur->right=cur->parent->parent; 156 cur->parent->parent->parent=cur; 157 158 cur->parent->parent=cur; 159 cur->left=cur->parent; 160 161 if(pr!=NULL) 162 { 163 cur->parent=pr; 164 if(cur->nodeValue<pr->nodeValue) 165 pr->left=cur; 166 else pr->right=cur; 167 } 168 else 169 { 170 cur->parent=NULL; 171 root=cur; 172 } 173 }; 174 175 void rightleftRotate(AVLnode *cur) 176 { 177 //cur is the third one 178 //全空 179 if(cur->left==NULL&&cur->right==NULL) 180 { 181 cur->parent->left=NULL; 182 cur->parent->parent->right=NULL; 183 } 184 //一边空 另一边最多一个 185 else if(cur->left==NULL) 186 { 187 cur->right->parent=cur->parent; 188 cur->parent->left=cur->right; 189 cur->parent->parent->right=NULL; 190 } 191 else if(cur->right==NULL) 192 { 193 cur->left->parent=cur->parent->parent; 194 cur->parent->parent->right=cur->left; 195 cur->parent->left=NULL; 196 } 197 //非空 挂在一边 另一边最多只有一个元素 198 else 199 { 200 cur->right->parent=cur->parent; 201 cur->parent->left=cur->right; 202 203 cur->left->parent=cur->parent->parent; 204 cur->parent->parent->right=cur->left; 205 206 } 207 AVLnode *pr=cur->parent->parent->parent; 208 209 cur->left=cur->parent->parent; 210 cur->parent->parent->parent=cur; 211 212 cur->parent->parent=cur; 213 cur->right=cur->parent; 214 215 if(pr!=NULL) 216 { 217 cur->parent=pr; 218 if(cur->nodeValue<pr->nodeValue) 219 pr->left=cur; 220 else pr->right=cur; 221 } 222 else 223 { 224 cur->parent=NULL; 225 root=cur; 226 } 227 } 228 229 230 }; 231 232 #endif // !defined(AFX_AVLTREE_H__36B69688_6A87_4949_A008_13138B14D185__INCLUDED_)
1 // menu.h: interface for the menu class. 2 // 3 ////////////////////////////////////////////////////////////////////// 4 5 #if !defined(AFX_MENU_H__A58647F3_F271_4C38_8097_A38DF9CA38CF__INCLUDED_) 6 #define AFX_MENU_H__A58647F3_F271_4C38_8097_A38DF9CA38CF__INCLUDED_ 7 8 #if _MSC_VER > 1000 9 #pragma once 10 #endif // _MSC_VER > 1000 11 #include "AVLtree.h" 12 #include <fstream> 13 #include <stack> 14 using namespace std; 15 16 class menu 17 { 18 public: 19 menu(); 20 virtual ~menu(); 21 void select(); 22 void menuInsert(); 23 void menuLogin(); 24 void menulogsuccess(AVLnode *login); 25 void menuChange(AVLnode *login); 26 void menuDelete(AVLnode *login); 27 void menuexit(); 28 29 30 private: 31 AVLtree tree; 32 }; 33 34 #endif // !defined(AFX_MENU_H__A58647F3_F271_4C38_8097_A38DF9CA38CF__INCLUDED_)
1 // menu.cpp: implementation of the menu class. 2 // 3 ////////////////////////////////////////////////////////////////////// 4 5 #include "menu.h" 6 7 ////////////////////////////////////////////////////////////////////// 8 // Construction/Destruction 9 ////////////////////////////////////////////////////////////////////// 10 11 menu::menu() 12 { 13 ifstream f; 14 f.open("1.txt"); 15 string id,pass; 16 while(!f.eof()) 17 { 18 f>>id>>pass; 19 AVLnode *t=tree.insert(id); 20 t->password=pass; 21 } 22 f.close(); 23 } 24 25 menu::~menu() 26 { 27 28 } 29 void menu::select() 30 { 31 cout<<"--------------------------------------------------------------------------------\n"; 32 cout<<" welcome \n"; 33 cout<<"--------------------------------------------------------------------------------\n"; 34 cout<<"--------------------------------------------------------------------------------\n"; 35 cout<<" 1.注册账号 \n\n"; 36 cout<<" 2.登录账号 \n\n"; 37 cout<<" 3.退 出 \n\n"; 38 cout<<"--------------------------------------------------------------------------------\n"; 39 cout<<"输入数字进行选择："; 40 int choice; 41 cin>>choice; 42 if(choice==1) 43 menuInsert(); 44 if(choice==2) 45 menuLogin(); 46 else 47 menuexit(); 48 } 49 50 void menu::menuInsert() 51 { 52 cout<<"--------------------------------------------------------------------------------\n"; 53 cout<<" 注册账号 \n"; 54 cout<<"--------------------------------------------------------------------------------\n"; 55 bool exist=true; 56 string userId; 57 string npassword; 58 while(exist) 59 { 60 cout<<"请输入账号: "; 61 cin>>userId; 62 63 AVLnode *judge=tree.search(userId); 64 if(judge==NULL) exist=false; 65 else cout<<"您输入的用户名已存在！\n"; 66 } 67 AVLnode *cur=tree.insert(userId); 68 69 cout<<"请输入密码: "; 70 cin>>npassword; 71 cur->password=npassword; 72 menuexit(); //更新注册后的用户信息 否则删除出错。 73 cout<<"--------------------------------------------------------------------------------\n"; 74 cout<<" 注册成功！ \n"; 75 cout<<"--------------------------------------------------------------------------------\n"; 76 cout<<"按1键返回上层..."; 77 int num; 78 cin>>num; 79 if(num==1) 80 select(); 81 else 82 menuexit(); 83 } 84 85 void menu::menuLogin() 86 { 87 cout<<"--------------------------------------------------------------------------------\n"; 88 cout<<" 登录账号 \n"; 89 cout<<"--------------------------------------------------------------------------------\n"; 90 string userId; 91 string npassword; 92 cout<<"请输入账号: "; 93 cin>>userId; 94 cout<<"请输入密码: "; 95 cin>>npassword; 96 AVLnode *login=tree.search(userId); 97 if(login==NULL) 98 { 99 cout<<"--------------------------------------------------------------------------------\n"; 100 cout<<" 您输入的账号不存在! \n"; 101 cout<<"--------------------------------------------------------------------------------\n"; 102 cout<<"按下1键重新输入...\n"; 103 int num; 104 cin>>num; 105 if(num==1) 106 menuLogin(); 107 else 108 menuexit(); 109 } 110 else 111 { 112 if(login->password==npassword) 113 menulogsuccess(login); 114 else 115 { 116 cout<<"--------------------------------------------------------------------------------\n"; 117 cout<<" 密码错误! \n"; 118 cout<<"--------------------------------------------------------------------------------\n"; 119 cout<<"按下1键重新输入..."; 120 int num; 121 cin>>num; 122 if(num==1) 123 menuLogin(); 124 else 125 menuexit(); 126 } 127 } 128 } 129 130 void menu::menulogsuccess(AVLnode *login) 131 { 132 cout<<"--------------------------------------------------------------------------------\n"; 133 cout<<" 登录成功! \n"; 134 cout<<"--------------------------------------------------------------------------------\n"; 135 cout<<"--------------------------------------------------------------------------------\n"; 136 cout<<" 1.修改密码 \n\n"; 137 cout<<" 2.删除账号 \n\n"; 138 cout<<" 3.回主菜单 \n\n"; 139 cout<<"--------------------------------------------------------------------------------\n"; 140 cout<<"输入数字进行选择："; 141 int choice; 142 cin>>choice; 143 if(choice==3) select(); 144 if(choice==1) 145 menuChange(login); 146 if(choice==2) 147 menuDelete(login); 148 else 149 menuexit(); 150 } 151 152 void menu::menuChange(AVLnode *login) 153 { 154 cout<<"请输入新密码: "; 155 string npassword; 156 cin>>npassword; 157 158 cout<<"请再次输入新密码: "; 159 string check; 160 cin>>check; 161 162 if(check==npassword) 163 { 164 login->password=npassword; 165 cout<<"--------------------------------------------------------------------------------\n"; 166 cout<<" 修改成功! \n"; 167 cout<<"--------------------------------------------------------------------------------\n"; 168 cout<<"按下1键返回登录..."; 169 int num; 170 cin>>num; 171 if(num==1) 172 menuLogin(); 173 else 174 menuexit(); 175 } 176 else 177 { 178 cout<<"--------------------------------------------------------------------------------\n"; 179 cout<<" 两次输入不一致! \n"; 180 cout<<"--------------------------------------------------------------------------------\n"; 181 cout<<"按下1键返回修改 2键返回登录界面..."; 182 int num; 183 cin>>num; 184 if(num==1) 185 menuChange(login); 186 else if(num==2) 187 menulogsuccess(login); 188 else menuexit(); 189 } 190 } 191 192 void menu::menuDelete(AVLnode *login) 193 { 194 cout<<"--------------------------------------------------------------------------------\n"; 195 cout<<" 确认删除？ \n"; 196 cout<<"--------------------------------------------------------------------------------\n"; 197 cout<<"按下1键确认 2键返回初始界面..."; 198 int num; 199 cin>>num; 200 if(num==1) 201 { 202 tree.remove(login->nodeValue); 203 cout<<"--------------------------------------------------------------------------------\n"; 204 cout<<" 删除成功！ \n"; 205 cout<<"--------------------------------------------------------------------------------\n"; 206 cout<<"按下1键返回初始界面..."; 207 int n; 208 cin>>n; 209 if(n==1) 210 select(); 211 else 212 menuexit(); 213 } 214 else if(num==2) 215 select(); 216 else menuexit(); 217 } 218 219 void menu::menuexit() 220 { 221 ofstream f; 222 f.open("1.txt"); 223 string id,pass; 224 225 stack<AVLnode*> s; 226 AVLnode *p=tree.getRoot(); 227 while(p!=NULL||!s.empty()) 228 { 229 while(p!=NULL) 230 { 231 s.push(p); 232 p=p->left; 233 } 234 if(!s.empty()) 235 { 236 p=s.top(); 237 id=p->nodeValue; 238 pass=p->password; 239 f<<id<<" "<<pass<<"\n"; 240 241 s.pop(); 242 p=p->right; 243 } 244 } 245 f.flush(); 246 f.close(); 247 248 }
1 #include "AVLnode.h" 2 #include "AVLtree.h" 3 #include "menu.h" 4 #include <iostream> 5 using namespace std; 6 int main() 7 { 8 9 menu guest; 10 guest.select(); 11 return 0; 12 }
1 // AVLtree.cpp: implementation of the AVLtree class. 2 // 3 ////////////////////////////////////////////////////////////////////// 4 5 #include "AVLtree.h" 6 7 ////////////////////////////////////////////////////////////////////// 8 // Construction/Destruction 9 ////////////////////////////////////////////////////////////////////// 10 11 AVLtree::AVLtree() 12 { 13 root=NULL; 14 treeSize=0; 15 } 16 17 AVLtree::~AVLtree() 18 { 19 } 20 AVLnode *AVLtree::getRoot() 21 { 22 return root; 23 } 24 25 AVLnode *AVLtree::creatAVLNode (const string item, AVLnode *lptr, AVLnode *rptr, AVLnode *pptr) 26 { 27 AVLnode *newNode; 28 // initialize the data and all pointers 29 newNode = new AVLnode (item, lptr, rptr, pptr); 30 return newNode; 31 } 32 33 void AVLtree::displayTree(int maxCharacters) 34 { 35 string label; 36 int level = 0, column = 0; 37 int colWidth = maxCharacters + 1; 38 39 int currLevel = 0, currCol = 0; 40 41 if (treeSize == 0) 42 return; 43 44 tnodeShadow *shadowRoot = buildShadowTree(root, level, column); 45 46 tnodeShadow *currNode; 47 48 queue<tnodeShadow *> q; 49 50 q.push(shadowRoot); 51 52 while(!q.empty()) 53 { 54 currNode = q.front(); 55 q.pop(); 56 57 if (currNode->level > currLevel) 58 { 59 currLevel = currNode->level; 60 currCol = 0; 61 cout << endl; 62 } 63 64 if(currNode->left != NULL) 65 q.push(currNode->left); 66 67 if(currNode->right != NULL) 68 q.push(currNode->right); 69 70 if (currNode->column > currCol) 71 { 72 cout << setw((currNode->column-currCol)*colWidth) << " "; 73 currCol = currNode->column; 74 } 75 cout << setw(colWidth) << currNode->nodeValueStr; 76 currCol++; 77 } 78 cout << endl; 79 80 deleteShadowTree(shadowRoot); 81 } 82 83 void AVLtree::deleteShadowTree(tnodeShadow *t) 84 { 85 if (t != NULL) 86 { 87 deleteShadowTree(t->left); 88 deleteShadowTree(t->right); 89 delete t; 90 } 91 } 92 93 AVLnode *AVLtree::insert(const string &item) 94 { 95 AVLnode *t=root,*newnode,*parent=NULL; 96 while(t!=NULL) 97 { 98 parent=t; 99 if(item==t->nodeValue) 100 return NULL; 101 else if(item<t->nodeValue) 102 t=t->left; 103 else 104 t=t->right; 105 } 106 newnode=creatAVLNode(item,NULL,NULL,parent); 107 if(parent==NULL) 108 root=newnode; 109 else if(item>parent->nodeValue) 110 parent->right=newnode; 111 else 112 parent->left=newnode; 113 treeSize++; 114 115 int bf=0,count=0; 116 AVLnode *cur=newnode,*p=newnode; 117 while(bf>=-1&&bf<=1&&cur!=root) 118 { 119 cur=cur->parent; 120 count++; 121 bf=balanceFactor(cur); 122 } 123 124 if(bf<-1||bf>1) 125 { 126 if(count==2) ; 127 else 128 { 129 for(int i=0;i<count-2;i++) 130 p=p->parent; 131 } 132 //all left 133 if(p->nodeValue<p->parent->nodeValue&&p->parent->nodeValue<cur->nodeValue) 134 rightRotate(p->parent); 135 136 //all right 137 else if(p->nodeValue>p->parent->nodeValue&&p->parent->nodeValue>cur->nodeValue) 138 leftRotate(p->parent); 139 140 //right left 141 else if(p->nodeValue<p->parent->nodeValue&&p->parent->nodeValue>cur->nodeValue) 142 rightleftRotate(p); 143 //left right 144 else if(p->nodeValue>p->parent->nodeValue&&p->parent->nodeValue<cur->nodeValue) 145 leftrightRotate(p); 146 } 147 return newnode; 148 } 149 150 void AVLtree::remove(const string &item) 151 { 152 AVLnode *t=search(item); 153 if(t==NULL) return; 154 155 //leaf node 156 else if(t->left==NULL&&t->right==NULL) 157 { 158 if(t==root) 159 root=NULL; 160 else if(t->nodeValue>t->parent->nodeValue) 161 t->parent->right=NULL; 162 else 163 t->parent->left=NULL; 164 } 165 //only left or right 166 else if(t->left==NULL) 167 { 168 if(t==root) 169 { 170 t->right->parent=NULL; 171 root=t->right; 172 } 173 else if(t->nodeValue>t->parent->nodeValue) 174 t->parent->right=t->right; 175 else 176 t->parent->left=t->right; 177 t->right->parent=t->parent; 178 } 179 else if(t->right==NULL) 180 { 181 if(t==root) 182 { 183 t->left->parent=NULL; 184 root=t->left; 185 } 186 else if(t->nodeValue>t->parent->nodeValue) 187 t->parent->right=t->left; 188 else 189 t->parent->left=t->left; 190 t->left->parent=t->parent; 191 } 192 //left && right 193 else 194 { 195 AVLnode *r=t; 196 if(t==root) 197 { 198 r=r->right; 199 while(r->left!=NULL) 200 r=r->left; 201 202 r->left=t->left; 203 t->left->parent=r; 204 if(r->right==NULL&&r->parent!=root) 205 { 206 r->right=t->right; 207 t->right->parent=r; 208 r->parent->left=NULL; 209 } 210 else if(r->parent!=root) 211 { 212 r->parent->left=r->right; 213 r->right->parent=r->parent; 214 r->right=t->right; 215 t->right->parent=r; 216 } 217 218 r->parent=NULL; 219 root=r; 220 221 } 222 223 else if(t->nodeValue>t->parent->nodeValue) 224 { 225 r=r->right; 226 while(r->left!=NULL) 227 r=r->left; 228 229 if(r->parent!=t) 230 { 231 if(r->right==NULL) 232 r->parent->left=NULL; 233 else 234 { 235 r->right->parent=r->parent; 236 r->parent->left=r->right; 237 } 238 239 r->right=t->right; 240 t->right->parent=r; 241 242 r->parent=t->parent; 243 t->parent->right=r; 244 r->left=t->left; 245 t->left->parent=r; 246 } 247 else 248 { 249 r->parent=t->parent; 250 t->parent->right=r; 251 r->left=t->left; 252 t->left->parent=r; 253 } 254 255 } 256 else 257 { 258 r=r->right; 259 while(r->left!=NULL) 260 r=r->left; 261 262 if(r->parent!=t) 263 { 264 if(r->right==NULL) 265 r->parent->left=NULL; 266 else 267 { 268 r->right->parent=r->parent; 269 r->parent->left=r->right; 270 } 271 272 r->right=t->right; 273 t->right->parent=r; 274 275 r->parent=t->parent; 276 t->parent->left=r; 277 r->left=t->left; 278 t->left->parent=r; 279 } 280 else 281 { 282 r->parent=t->parent; 283 t->parent->left=r; 284 r->left=t->left; 285 t->left->parent=r; 286 } 287 288 } 289 } 290 treeSize--; 291 delete t; 292 //平衡部分 293 294 } 295 296 AVLnode *AVLtree::search(const string &item) const 297 { 298 AVLnode *t=root; 299 while(t!=NULL) 300 { 301 if(t->nodeValue==item) return t; 302 else if(item<t->nodeValue) 303 t=t->left; 304 else t=t->right; 305 306 } 307 return NULL; 308 } 309 310 tnodeShadow *AVLtree::buildShadowTree(AVLnode *t, int level, int& column) 311 { 312 tnodeShadow *newNode = NULL; 313 char text[80]; 314 ostrstream ostr(text,80); 315 316 if (t != NULL) 317 { 318 newNode = new tnodeShadow; 319 320 tnodeShadow *newLeft = buildShadowTree(t->left, level+1, column); 321 newNode->left = newLeft; 322 323 ostr << t->nodeValue << ends; 324 newNode->nodeValueStr = text; 325 newNode->level = level; 326 newNode->column = column; 327 328 column++; 329 330 tnodeShadow *newRight = buildShadowTree(t->right, level+1, column); 331 newNode->right = newRight; 332 } 333 334 return newNode; 335 }
附调试时用的结构化打印树的函数
1 // tnodeShadow.h: interface for the tnodeShadow class. 2 // 3 ////////////////////////////////////////////////////////////////////// 4 5 #if !defined(AFX_TNODESHADOW_H__18034BAE_051F_4D57_91FF_BE10AFD37CDA__INCLUDED_) 6 #define AFX_TNODESHADOW_H__18034BAE_051F_4D57_91FF_BE10AFD37CDA__INCLUDED_ 7 8 #if _MSC_VER > 1000 9 #pragma once 10 #endif // _MSC_VER > 1000 11 12 #include <iomanip> // for setw() 13 #include <strstream> // for format conversion 14 #include <string> // node data formatted as a string 15 #include <queue> 16 #include <utility> 17 18 using namespace std; 19 20 class tnodeShadow 21 { 22 public: 23 string nodeValueStr; // formatted node value 24 int level,column; 25 tnodeShadow *left, *right; 26 27 tnodeShadow () 28 {} 29 }; 30 #endif // !defined(AFX_TNODESHADOW_H__18034BAE_051F_4D57_91FF_BE10AFD37CDA__INCLUDED_)
第一次写这么完整的程序 运行的一刻真的好爽！