利用搜索二叉樹判斷一個單詞是否拼寫正確:
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假設把所有單詞都按照搜索樹的性質插入到搜索二叉樹中,我們判斷一個單詞拼寫是否正確就是在樹中查找該單詞是否存在(查找key是否存在)。
/***************************************** *Date:2018年3月26日14:42:54 *Author: Meng *WebSite:msyci.com *QQ:3515955122 *****************************************/ # include <stdio.h> # include <stdlib.h> # include <string.h> #include<assert.h> typedef char* KeyType; typedef char* ValueType; typedef struct BSTreeNode { struct BSTreeNode* _left; struct BSTreeNode* _right; KeyType _key; ValueType _value; }BSTreeNode; BSTreeNode *BuyTreeNode(KeyType x,ValueType value ) //創(chuàng)建節(jié)點 { BSTreeNode *node = (BSTreeNode*)malloc(sizeof(BSTreeNode)); assert(node); node->_key = x; node->_left = NULL; node->_right = NULL; node->_value = value; return node; } //插入、查找函數(shù) int BSTreeNodeInsertR(BSTreeNode **tree,KeyType key, ValueType value) //搜索樹的插入 { int tmp = 0; if(*tree == NULL) { *tree = BuyTreeNode(key,value); return 0; } tmp = strcmp((*tree)->_key,key); if (tmp>0) return BSTreeNodeInsertR(&(*tree)->_left,key,value); else if (tmp<0) return BSTreeNodeInsertR(&(*tree)->_right,key,value); else return -1; } BSTreeNode* BSTreeNodeFindR(BSTreeNode* tree, KeyType key) //查找 { int tmp = 0; if(!tree) { return NULL; } tmp = strcmp(tree->_key, key); if(tmp > 0) { return BSTreeNodeFindR(tree->_left, key); } else if (tmp < 0) { return BSTreeNodeFindR(tree->_right, key); } else { return tree; } } void TestApplication() { BSTreeNode *tree = NULL; BSTreeNodeInsertR(&tree,"China","中國"); BSTreeNodeInsertR(&tree,"score","成績"); BSTreeNodeInsertR(&tree,"char","字符"); BSTreeNodeInsertR(&tree,"int","×××"); BSTreeNodeInsertR(&tree,"float","浮點型"); printf("%s \n", BSTreeNodeFindR(tree,"char")->_value); printf("%s \n", BSTreeNodeFindR(tree,"int")->_value); printf("%s \n", BSTreeNodeFindR(tree,"float")->_value); printf("%s \n", BSTreeNodeFindR(tree,"China")->_value); printf("%s \n", BSTreeNodeFindR(tree,"score")->_value); printf("%p \n", BSTreeNodeFindR(tree,"double")); } int main(void) { TestApplication(); char c = getchar(); return 0; }
運行結果:
實現(xiàn)簡單的中英文字典
/***************************************** *Date:2018年3月26日15:35:07 *Author: Meng *WebSite:msyci.com *QQ:3515955122 *****************************************/ # include <stdio.h> # include <stdlib.h> # include <string.h> #include<assert.h> typedef char* KeyType; typedef char* ValueType; typedef struct BSTreeNode { struct BSTreeNode* _left; struct BSTreeNode* _right; KeyType _key; ValueType _value; }BSTreeNode; BSTreeNode *BuyTreeNode(KeyType x,ValueType value ) //創(chuàng)建節(jié)點 { BSTreeNode *node = (BSTreeNode*)malloc(sizeof(BSTreeNode)); assert(node); node->_key = x; node->_left = NULL; node->_right = NULL; node->_value = value; return node; } //插入、查找函數(shù) int BSTreeNodeInsertR(BSTreeNode **tree,KeyType key, ValueType value) //搜索樹的插入 { int tmp = 0; if(*tree == NULL) { *tree = BuyTreeNode(key,value); return 0; } tmp = strcmp((*tree)->_key,key); if (tmp>0) return BSTreeNodeInsertR(&(*tree)->_left,key,value); else if (tmp<0) return BSTreeNodeInsertR(&(*tree)->_right,key,value); else return -1; } BSTreeNode* BSTreeNodeFindR(BSTreeNode* tree, KeyType key) //查找 { int tmp = 0; if(!tree) { return NULL; } tmp = strcmp(tree->_key, key); if(tmp > 0) { return BSTreeNodeFindR(tree->_left, key); } else if (tmp < 0) { return BSTreeNodeFindR(tree->_right, key); } else { return tree; } } void TestApplication() { BSTreeNode *tree = NULL; BSTreeNodeInsertR(&tree,"China","中國"); BSTreeNodeInsertR(&tree,"score","成績"); BSTreeNodeInsertR(&tree,"char","字符"); BSTreeNodeInsertR(&tree,"int","×××"); BSTreeNodeInsertR(&tree,"float","浮點型"); printf("%s \n", BSTreeNodeFindR(tree,"char")->_value); printf("%s \n", BSTreeNodeFindR(tree,"int")->_value); printf("%s \n", BSTreeNodeFindR(tree,"float")->_value); printf("%s \n", BSTreeNodeFindR(tree,"China")->_value); printf("%s \n", BSTreeNodeFindR(tree,"score")->_value); printf("%p \n", BSTreeNodeFindR(tree,"double")); } int main(void) { TestApplication(); char c = getchar(); return 0; }
運行結果:
網頁題目:搜索二叉樹之字典實現(xiàn)
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