1、创建一个抽象类：Humans
/// <summary>
/// 抽象父类：humans,两个抽象
/// </summary>
abstract class Humans
{
public abstract void Say();
public abstract void DriveDiraction();
}
2、创建一个Chinese类继承Humans,并重写Humans的两个方法
class Chinese : Humans
{
public override void Say()
{
Console.WriteLine("你好，我是中国人");
}
public override void DriveDiraction()
{
Console.WriteLine("中国方向盘在左边");
}
}
3、创建一个American类继承Humans,并重写Humans的两个方法
class American : Humans
{
public override void Say()
{
Console.WriteLine("hello, i am american!");
}
public override void DriveDiraction()
{
Console.WriteLine("The American Direction is Right!");
}
}
4、在Main()方法实例化抽象类：Humans
class Program
{
static void Main(string[] args)
{
//在实例化抽象类abstract时，new 其子类
Humans china = new Chinese();
china.Say();
china.DriveDiraction();
Console.ReadKey();
}
}
