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+# 热身赛一级赛题1：基于cortex-m3-emulator实现哈希表并测试验证
+
+参赛战队：bdislab_Rhodes	赛题issue：热身赛一级赛题1	完成情况：完成哈希表，支持链地址法解决哈希冲突
+
+## 1. 简介
+
+注册shell命令及哈希命令集说明
+
+0.注册TestHash、creatHashTable命令，源文件见：xiuos/APP_Framework/Applications/app_test/test_hash/test_hash.c
+
+1.创建初始化哈希表
+
+```QEMU
+creatHashTable
+```
+
+说明：
+
+- 创建一个大小为10的哈希表并初始化
+
+2.插入键值对(key,value)
+
+```QEMU
+TestHash 1 key value
+```
+
+说明：
+
+- 根据key值进行哈希映射插入到哈希表中，若发生哈希冲突用链地址法解决哈希冲突
+- 若(key,value)已存在则不进行插入
+- 若key存在但value值不同，则替换value值
+- 注：key和value仅支持int类型
+
+3.删除键值对(key,value)
+
+```QEMU
+TestHash 2 key
+```
+
+说明：
+
+- 若哈希表中存在key值，则删除对应的(key,value)并显示success
+- 若哈希表中找不到key值，则显示failed
+
+4.搜索key值
+
+```QEMU
+TestHash 3 key
+```
+
+说明：
+
+- 若哈希表中存在key值，则返回对应的(key,value)对
+- 若哈希表中不存在key值，则显示“query key(key),not exist”
+
+5.打印哈希表
+
+```QEMU
+TestHash 4
+```
+
+说明：
+
+- 将当前哈希表打印出来
+
+6.获取帮助
+
+```QEMU
+TestHash h
+```
+
+说明：
+
+- 获取帮助菜单
+
+7.若输入的指令不符合上述任何一条则返回error
+
+## 2. 数据结构设计说明
+
+首先设计了一个结构体Node表示每一个哈希节点，包含key值和value值，因为要使用链地址法解决哈希冲突，所以还要加上指向下一个节点的指针。然后又定义了哈希表的结构体，包含指向哈希节点指针的指针，即包含一系列指针的数组。
+
+```C
+#define TABLE_SIZE 10	//哈希表大小定为10
+
+// 哈希节点
+typedef struct Node {
+    int key;
+    int value;
+    struct Node* next;
+} Node;
+
+// 哈希表
+typedef struct HashTable {
+    Node** buckets;
+} HashTable;
+```
+
+此外，
+
+```C
+//创建哈希节点
+Node* createNode(int key, int value) 
+//创建并初始化哈希表
+HashTable* createHashTable()
+//哈希函数
+int hashFunction(int key) 
+//搜索key值
+int search(HashTable* hashTable, int key)
+//插入(key,value)
+void insert(HashTable* hashTable, int key, int value)
+//删除(key,value)
+int removeEntry(HashTable* hashTable, int key) 
+//打印当前哈希表
+void printHashTable(HashTable* hashTable)
+```
+
+## 3. 测试程序说明
+
+测试结果，打印验证功能，均正确
+
+## 4. 运行结果(包含测试流程及截图)
+
+启动QEMU
+
+![image-20230628131058294](README.assets/image-20230628131058294.png)
+
+输入Help获取帮助，看到TestHash和createHashTable已经注册
+
+![image-20230628131132800](README.assets/image-20230628131132800.png)
+
+输入createHashTable创建并初始化哈希表
+
+![image-20230628131255814](README.assets/image-20230628131255814.png)
+
+输入TestHash h获取帮助
+
+![image-20230628131221195](README.assets/image-20230628131221195.png)
+
+输入TestHash 1 2 12插入(2,12)，显示插入成功。
+
+![image-20230628133115520](README.assets/image-20230628133115520.png)
+
+输入TestHash 4查看当前哈希表状态，证明插入成功。
+
+![image-20230628133152340](README.assets/image-20230628133152340.png)
+
+输入TestHash 1 2 10，将(2,12)修改为(2,10)，再次打印哈希表证明修改成功
+
+![image-20230628133302284](README.assets/image-20230628133302284.png)
+
+紧接着插入(5,15)和(55,77)并打印，再插入(65,12)并打印，均插入成功
+
+![image-20230628131348882](README.assets/image-20230628131348882.png)
+
+![image-20230628131403511](README.assets/image-20230628131403511.png)
+
+输入TestHash 2 5删除(5,15)并打印，证明删除成功
+
+![image-20230628131427721](README.assets/image-20230628131427721.png)
+
+删除表中不存在的key值4，显示failed
+
+![image-20230628132233620](README.assets/image-20230628132233620.png)
+
+查找key值55返回value值77，证明查找成功
+
+![image-20230628131447209](README.assets/image-20230628131447209.png)
+
+查找哈希表中不存在的key值4，返回not exist
+
+![image-20230628131505520](README.assets/image-20230628131505520.png)
+
+测试完毕
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