diff --git a/大作业代码.py b/大作业代码.py
new file mode 100644
index 0000000..9cb49e6
--- /dev/null
+++ b/大作业代码.py
@@ -0,0 +1,117 @@
+# -*- coding: utf-8 -*-
+import json
+import os
+
+DATA_FILE = 'students.json'
+
+def load_students():
+    """从文件加载学生数据"""
+    if os.path.exists(DATA_FILE):
+        with open(DATA_FILE, 'r', encoding='utf-8') as f:
+            return json.load(f)
+    return []
+
+def save_students(students):
+    """保存学生数据到文件"""
+    with open(DATA_FILE, 'w', encoding='utf-8') as f:
+        json.dump(students, f, ensure_ascii=False, indent=2)
+
+def input_student_info():
+    """输入学生信息并验证"""
+    name = input("请输入姓名：").strip()
+    while not name:
+        print("姓名不能为空！")
+        name = input("请输入姓名：").strip()
+
+    gender = input("请输入性别（男/女）：").strip()
+    while gender not in ['男', '女']:
+        print("性别输入错误，请重新输入！")
+        gender = input("请输入性别（男/女）：").strip()
+
+    class_name = input("请输入班级：").strip()
+    while not class_name:
+        print("班级不能为空！")
+        class_name = input("请输入班级：").strip()
+
+    phone = input("请输入电话号码：").strip()
+    while not (phone.isdigit() and len(phone) >= 7):
+        print("电话号码必须为数字且至少7位！")
+        phone = input("请输入电话号码：").strip()
+
+    return {
+        'name': name,
+        'gender': gender,
+        'class': class_name,
+        'phone': phone
+    }
+
+def add_student(students):
+    """添加学生"""
+    student = input_student_info()
+    students.append(student)
+    print(f"学生 {student['name']} 添加成功！")
+
+def delete_student(students):
+    """删除学生"""
+    name = input("请输入要删除的学生姓名：").strip()
+    found = [s for s in students if s['name'] == name]
+    
+    if not found:
+        print("未找到该学生！")
+        return
+    
+    for s in found:
+        students.remove(s)
+    
+    print(f"已删除 {len(found)} 个名为 {name} 的学生")
+
+def search_student(students):
+    """查询学生"""
+    keyword = input("请输入查询关键字（姓名或班级）：").strip()
+    results = []
+    
+    for s in students:
+        if keyword in s['name'] or keyword in s['class']:
+            results.append(s)
+    
+    if not results:
+        print("未找到匹配的学生！")
+        return
+    
+    print("\n查询结果：")
+    for i, student in enumerate(results, 1):
+        print(f"{i}. 姓名：{student['name']}")
+        print(f"   性别：{student['gender']}")
+        print(f"   班级：{student['class']}")
+        print(f"   电话：{student['phone']}\n")
+
+def show_menu():
+    """显示主菜单"""
+    print("\n学生通讯录管理系统")
+    print("1. 添加学生")
+    print("2. 删除学生")
+    print("3. 查询学生")
+    print("4. 退出系统")
+
+def main():
+    students = load_students()
+    
+    while True:
+        show_menu()
+        choice = input("请选择操作（1-4）：").strip()
+        
+        if choice == '1':
+            add_student(students)
+        elif choice == '2':
+            delete_student(students)
+        elif choice == '3':
+            search_student(students)
+        elif choice == '4':
+            save_students(students)
+            print("系统已退出，数据已保存！")
+            break
+        else:
+            print("输入无效，请重新输入！")
+
+if __name__ == '__main__':
+    main()
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