c# 多态 代码示例

以下是一个C#多态的代码示例：

// 定义一个Person类
public class Person
{
    protected string name;

    public Person(string name)
    {
        this.name = name;
    }

    public virtual void SayHello()
    {
        Console.WriteLine("Hello, I am {0}.", name);
    }
}

// 定一个Student类，继承自Person类
public class Student : Person
{
    public Student(string name) : base(name)
    {
    }

    public override void SayHello()
    {
        Console.WriteLine("Hello, I am a student, my name is {0}.", name);
    }
}

// 定义一个Teacher类，继承自Person类
public class Teacher : Person
{
    public Teacher(string name) : base(name)
    {
    }

    public override void SayHello()
    {
        Console.WriteLine("Hello, I am a teacher, my name is {0}.", name);
    }
}

// 在Main函数中使用多态
Person[] p = { new Student("李雷"), new Teacher("井边君") };
for (int i = 0; i < p.Length; i++)
{
    p[i].SayHello();
}

输出结果为：

Hello, I am a student, my name is 李雷.
Hello, I am a teacher, my name is 井边君.