2024-11-14《继续c#学习》
今天进行了C#的学习,继续了解C#的相关知识:
继承
继承就是基类派生出去多种类,就好比狗是哺乳动物,狗是派生类,哺乳动物是基类。
下面是一个简单的继承:
| using System; | |
| namespace InheritanceApplication | |
| { | |
| class Shape | |
| { | |
| public void setWidth(int w) | |
| { | |
| width = w; | |
| } | |
| public void setHeight(int h) | |
| { | |
| height = h; | |
| } | |
| protected int width; | |
| protected int height; | |
| } | |
| // 派生类 | |
| class Rectangle: Shape | |
| { | |
| public int getArea() | |
| { | |
| return (width * height); | |
| } | |
| } | |
| class RectangleTester | |
| { | |
| static void Main(string[] args) | |
| { | |
| Rectangle Rect = new Rectangle(); | |
| Rect.setWidth(5); | |
| Rect.setHeight(7); | |
| // 打印对象的面积 | |
| Console.WriteLine("总面积: {0}", Rect.getArea()); | |
| Console.ReadKey(); | |
| } | |
| } | |
| } |
我们也可以进行多重继承:
| using System; | |
| namespace InheritanceApplication | |
| { | |
| class Shape | |
| { | |
| public void setWidth(int w) | |
| { | |
| width = w; | |
| } | |
| public void setHeight(int h) | |
| { | |
| height = h; | |
| } | |
| protected int width; | |
| protected int height; | |
| } | |
| // 基类 PaintCost | |
| public interface PaintCost | |
| { | |
| int getCost(int area); | |
| } | |
| // 派生类 | |
| class Rectangle : Shape, PaintCost | |
| { | |
| public int getArea() | |
| { | |
| return (width * height); | |
| } | |
| public int getCost(int area) | |
| { | |
| return area * 70; | |
| } | |
| } | |
| class RectangleTester | |
| { | |
| static void Main(string[] args) | |
| { | |
| Rectangle Rect = new Rectangle(); | |
| int area; | |
| Rect.setWidth(5); | |
| Rect.setHeight(7); | |
| area = Rect.getArea(); | |
| // 打印对象的面积 | |
| Console.WriteLine("总面积: {0}", Rect.getArea()); | |
| Console.WriteLine("油漆总成本: ${0}" , Rect.getCost(area)); | |
| Console.ReadKey(); | |
| } | |
| } | |
| } |
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