44 lines
710 B
Markdown
44 lines
710 B
Markdown
# 面向对象编程
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## 学习目标
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- 理解类和对象的概念
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- 掌握类的定义和使用
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- 了解继承和多态
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## 定义类
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```python
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class Dog:
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def __init__(self, name, age):
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self.name = name
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self.age = age
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def bark(self):
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return f"{self.name} 汪汪叫！"
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# 创建对象
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my_dog = Dog("旺财", 3)
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print(my_dog.bark())
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```
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## 继承
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```python
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class Animal:
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def __init__(self, name):
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self.name = name
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def speak(self):
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pass
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class Cat(Animal):
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def speak(self):
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return f"{self.name} 喵喵叫！"
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```
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## 动手练习
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1. 创建一个 BankAccount 类
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2. 实现存款和取款方法
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3. 使用继承创建不同类型的账户
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