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123 lines
2.6 KiB
Python
123 lines
2.6 KiB
Python
"""
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03 函数版本：学生增删改查
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相比列表版本：
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1. 数据仍然用列表和字典保存。
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2. 每个功能拆成一个函数。
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3. 主流程只负责显示菜单和分发任务。
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"""
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students = []
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next_id = 1
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def show_menu():
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print("\n====== 学生管理系统：函数版本 ======")
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print("1. 添加学生")
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print("2. 查看所有学生")
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print("3. 查询学生")
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print("4. 修改学生")
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print("5. 删除学生")
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print("0. 退出")
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def add_student():
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global next_id
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name = input("姓名：").strip()
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age = input("年龄：").strip()
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phone = input("电话：").strip()
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student = {
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"id": next_id,
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"name": name,
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"age": age,
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"phone": phone,
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}
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students.append(student)
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next_id += 1
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print("添加成功")
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def list_students():
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if not students:
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print("暂无学生")
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return
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for student in students:
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print(student)
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def find_student_by_id(student_id):
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for student in students:
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if str(student["id"]) == str(student_id):
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return student
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return None
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def search_student():
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keyword = input("请输入要查询的姓名：").strip()
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result = []
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for student in students:
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if student["name"] == keyword:
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result.append(student)
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if not result:
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print("没有找到该学生")
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return
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for student in result:
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print(student)
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def update_student():
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student_id = input("请输入要修改的学生 ID：").strip()
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student = find_student_by_id(student_id)
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if student is None:
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print("没有找到该学生")
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return
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student["name"] = input("新姓名：").strip()
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student["age"] = input("新年龄：").strip()
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student["phone"] = input("新电话：").strip()
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print("修改成功")
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def delete_student():
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student_id = input("请输入要删除的学生 ID：").strip()
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student = find_student_by_id(student_id)
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if student is None:
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print("没有找到该学生")
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return
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students.remove(student)
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print("删除成功")
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def main():
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while True:
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show_menu()
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choice = input("请输入操作编号：").strip()
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if choice == "1":
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add_student()
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elif choice == "2":
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list_students()
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elif choice == "3":
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search_student()
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elif choice == "4":
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update_student()
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elif choice == "5":
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delete_student()
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elif choice == "0":
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print("程序结束")
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break
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else:
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print("输入有误，请重新输入")
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if __name__ == "__main__":
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main()
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