面向对象习题

**面向对象程序设计习题**

###习题1:学生信息管理系统#### 题目描述设计一个学生信息管理系统，包括以下功能：

* 添加学生信息* 删除学生信息* 修改学生信息* 查询学生信息* 显示所有学生信息#### 类定义

class Student:
 def __init__(self, name, age, grade):
 self.name = name self.age = age self.grade = gradeclass StudentManager:
 def __init__(self):
 self.students = []

 def add_student(self, student):
 self.students.append(student)

 def delete_student(self, name):
 for i in range(len(self.students)):
 if self.students[i].name == name:
 del self.students[i]
 break def modify_student(self, old_name, new_name, age, grade):
 for i in range(len(self.students)):
 if self.students[i].name == old_name:
 self.students[i].name = new_name self.students[i].age = age self.students[i].grade = grade break def query_student(self, name):
 for student in self.students:
 if student.name == name:
 return student return None def display_all_students(self):
 for student in self.students:
 print(f"姓名：{student.name}, 年龄：{student.age}, 年级：{student.grade}")

#### 使用示例

manager = StudentManager()

# 添加学生信息manager.add_student(Student("张三",20, "高一"))
manager.add_student(Student("李四",21, "高二"))

# 删除学生信息manager.delete_student("张三")

# 修改学生信息manager.modify_student("李四", "王五",22, "高三")

# 查询学生信息student = manager.query_student("王五")
if student:
 print(f"姓名：{student.name}, 年龄：{student.age}, 年级：{student.grade}")
else:
 print("未找到学生信息")

# 显示所有学生信息manager.display_all_students()

###习题2:图书管理系统#### 题目描述设计一个图书管理系统，包括以下功能：

* 添加图书信息* 删除图书信息* 修改图书信息* 查询图书信息* 显示所有图书信息#### 类定义

class Book:
 def __init__(self, title, author, price):
 self.title = title self.author = author self.price = priceclass BookManager:
 def __init__(self):
 self.books = []

 def add_book(self, book):
 self.books.append(book)

 def delete_book(self, title):
 for i in range(len(self.books)):
 if self.books[i].title == title:
 del self.books[i]
 break def modify_book(self, old_title, new_title, author, price):
 for i in range(len(self.books)):
 if self.books[i].title == old_title:
 self.books[i].title = new_title self.books[i].author = author self.books[i].price = price break def query_book(self, title):
 for book in self.books:
 if book.title == title:
 return book return None def display_all_books(self):
 for book in self.books:
 print(f"书名：{book.title},作者：{book.author}, 价格：{book.price}")

#### 使用示例

manager = BookManager()

# 添加图书信息manager.add_book(Book("Python编程", "张三",50))
manager.add_book(Book("Java编程", "李四",60))

# 删除图书信息manager.delete_book("Python编程")

# 修改图书信息manager.modify_book("Java编程", "C++编程", "王五",70)

# 查询图书信息book = manager.query_book("C++编程")
if book:
 print(f"书名：{book.title},作者：{book.author}, 价格：{book.price}")
else:
 print("未找到图书信息")

# 显示所有图书信息manager.display_all_books()

###习题3:员工管理系统#### 题目描述设计一个员工管理系统，包括以下功能：

* 添加员工信息* 删除员工信息* 修改员工信息* 查询员工信息* 显示所有员工信息#### 类定义

class Employee:
 def __init__(self, name, age, department):
 self.name = name self.age = age self.department = departmentclass EmployeeManager:
 def __init__(self):
 self.employees = []

 def add_employee(self, employee):
 self.employees.append(employee)

 def delete_employee(self, name):
 for i in range(len(self.employees)):
 if self.employees[i].name == name:
 del self.employees[i]
 break def modify_employee(self, old_name, new_name, age, department):
 for i in range(len(self.employees)):
 if self.employees[i].name == old_name:
 self.employees[i].name = new_name self.employees[i].age = age self.employees[i].department = department break def query_employee(self, name):
 for employee in self.employees:
 if employee.name == name:
 return employee return None def display_all_employees(self):
 for employee in self.employees:
 print(f"姓名：{employee.name}, 年龄：{employee.age}, 部门：{employee.department}")

#### 使用示例

manager = EmployeeManager()

# 添加员工信息manager.add_employee(Employee("张三",30, "销售部"))
manager.add_employee(Employee("李四",31, "研发部"))

# 删除员工信息manager.delete_employee("张三")

# 修改员工信息manager.modify_employee("李四", "王五",32, "人事部")

# 查询员工信息employee = manager.query_employee("王五")
if employee:
 print(f"姓名：{employee.name}, 年龄：{employee.age}, 部门：{employee.department}")
else:
 print("未找到员工信息")

# 显示所有员工信息manager.display_all_employees()

###习题4:学生成绩管理系统#### 题目描述设计一个学生成绩管理系统，包括以下功能：

* 添加学生成绩信息* 删除学生成绩信息* 修改学生成绩信息* 查询学生成绩信息* 显示所有学生成绩信息#### 类定义

class Student:
 def __init__(self, name):
 self.name = name self.scores = []

class ScoreManager:
 def __init__(self):
 self.students = {}

 def add_score(self, student_name, score):
 if student_name not in self.students:
 self.students[student_name] = []
 self.students[student_name].append(score)

 def delete_score(self, student_name, score):
 if student_name in self.students and score in self.students[student_name]:
 self.students[student_name].remove(score)
 if len(self.students[student_name]) ==0:
 del self.students[student_name]

 def modify_score(self, old_student_name, new_student_name, old_score, new_score):
 if old_student_name in self.students and old_score in self.students[old_student_name]:
 self.students[new_student_name].append(new_score)
 self.students[old_student_name].remove(old_score)

 def query_score(self, student_name, score):
 if student_name in self.students and score in self.students[student_name]:
 return True return False def display_all_scores(self):
 for student_name, scores in self.students.items():
 print(f"学生：{student_name}, 成绩：{scores}")

#### 使用示例

manager = ScoreManager()

# 添加学生成绩信息manager.add_score("张三",90)
manager.add_score("李四",80)

# 删除学生成绩信息manager.delete_score("张三",90)

# 修改学生成绩信息manager.modify_score("李四", "王五",80,70)

# 查询学生成绩信息if manager.query_score("王五",70):
 print("找到学生成绩")
else:
 print("未找到学生成绩")

# 显示所有学生成绩信息manager.display_all_scores()

###习题5:图书分类管理系统#### 题目描述设计一个图书分类管理系统，包括以下功能：

* 添加图书分类信息* 删除图书分类信息* 修改图书分类信息* 查询图书分类信息* 显示所有图书分类信息#### 类定义

class BookCategory:
 def __init__(self, name):
 self.name = name self.books = []

class CategoryManager:
 def __init__(self):
 self.categories = {}