diff --git a/day7/homework/a.out b/day7/homework/a.out
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diff --git a/day7/homework/h6.c b/day7/homework/h6.c
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+++ b/day7/homework/h6.c
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+/*
+编写一个程序, 创建多个线程, 每个线程负责对一个共享链表进行搜索操作。要求实现线程间的同步, 确保每个线程搜索链表时不会干扰其他线程的工作。
+*/
+#include <stdio.h>
+#include <pthread.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
+pthread_mutex_t mutux = PTHREAD_MUTEX_INITIALIZER;
+
+typedef struct node
+{
+    char name[32];
+    struct node *next;
+} Node;
+
+Node *head; // 定义头节点
+
+void *find(void *data)
+{
+    int n = 0; // 标识待查询内容在链表中的索引号
+    char *name = (char *)data;
+    pthread_mutex_lock(&mutux);
+    // 查询
+    Node *p = head->next;
+    while (p != NULL)
+    {
+        if (strcmp(p->name, name) == 0)
+        {
+            printf("%s 在链表的索引为 %d\n", name, n);
+            pthread_mutex_unlock(&mutux);
+
+            return NULL;
+        }
+
+        n++;
+        p = p->next;
+    }
+    printf("%s 在链表中未找到\n", name);
+    pthread_mutex_unlock(&mutux);
+
+    return NULL;
+}
+
+// 添加节点
+void add_node(Node *head, char *name)
+{
+    Node *p = head;
+    while (p->next != NULL)
+        p = p->next;
+    Node *new_node = (Node *)malloc(sizeof(Node));
+    if (NULL == new_node)
+    {
+        perror("malloc error");
+        return;
+    }
+    memset(new_node, 0, sizeof(Node)); // 初始化新节点为默认值
+    strcpy(new_node->name, name);
+    p->next = new_node;
+}
+
+int main(int argc, char const *argv[])
+{
+    head = (Node *)malloc(sizeof(Node));
+    if (NULL == head)
+    {
+        perror("malloc error");
+        return 1;
+    }
+    memset(head, 0, sizeof(Node));
+
+    add_node(head, "a");
+    add_node(head, "b");
+    add_node(head, "c");
+    add_node(head, "d");
+
+    // 待查询字符表，包含查询的字符顺序
+    char *alphabet[4] = {"a", "e", "d", "b"};
+
+    pthread_t t[4];
+    for (int i = 0; i < 4; i++)
+    {
+        pthread_create(&t[i], NULL, find, (void *)alphabet[i]);
+    }
+
+    for (int i = 0; i < 4; i++)
+    {
+        pthread_join(t[i], NULL);
+    }
+
+    return 0;
+}