using System;
class Test
{
 public static void Main()
 {
  
  float[] vals={(float)2.0,(float)3.0};
  Quad q=new Quad(Val[0],Val[1]);
  Triangle t=new Triangle(Val[0],Val[1]);
  Console.WriteLine("Quad area is {0}",q.GetArea());
  Console.WriteLine("Triangle area is {0}",t.GetArea());
 }
}
public abstract class Shape
{
 protected float width;
 protected float height;
 public Shape(float w,float h)
 {
  width=w;
  height=h;
 }
 public abstract float GetArea();
}
public class Quad:Shape
{
 public Quad(float w,float h):base(w,h)
 {
 }
 public override float GetArea()
 {
  return width*height;
 }
}
public class Triangle:Quad
{
 public Triangle(float w,float h):base(w,h)
 {
 }
 public override float GetArea()
 {
  return 0.5F*width*height;
 }
}

不能运行

不是吧

visual c#.net

名称“val”在类或命名空间“test”不存在