131 lines
3.5 KiB
Python
131 lines
3.5 KiB
Python
"""
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04 类版本：学生增删改查
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相比函数版本：
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1. Student 表示一个学生。
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2. StudentManager 表示学生管理器。
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3. 数据和操作数据的方法被组织到类里面。
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"""
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class Student:
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def __init__(self, student_id, name, age, phone):
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self.id = student_id
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self.name = name
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self.age = age
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self.phone = phone
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def to_dict(self):
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return {
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"id": self.id,
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"name": self.name,
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"age": self.age,
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"phone": self.phone,
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}
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def __str__(self):
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return f"ID: {self.id}, 姓名: {self.name}, 年龄: {self.age}, 电话: {self.phone}"
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class StudentManager:
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def __init__(self):
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self.students = []
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self.next_id = 1
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def add_student(self):
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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 = Student(self.next_id, name, age, phone)
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self.students.append(student)
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self.next_id += 1
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print("添加成功")
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def list_students(self):
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if not self.students:
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print("暂无学生")
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return
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for student in self.students:
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print(student)
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def find_student_by_id(self, student_id):
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for student in self.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(self):
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keyword = input("请输入要查询的姓名：").strip()
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found = False
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for student in self.students:
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if student.name == keyword:
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print(student)
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found = True
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if not found:
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print("没有找到该学生")
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def update_student(self):
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student_id = input("请输入要修改的学生 ID：").strip()
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student = self.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(self):
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student_id = input("请输入要删除的学生 ID：").strip()
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student = self.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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self.students.remove(student)
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print("删除成功")
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def show_menu(self):
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print("\n====== 学生管理系统：类版本 ======")
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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 run(self):
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while True:
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self.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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self.add_student()
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elif choice == "2":
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self.list_students()
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elif choice == "3":
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self.search_student()
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elif choice == "4":
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self.update_student()
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elif choice == "5":
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self.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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manager = StudentManager()
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manager.run()
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