public static void Main(string[] args)
{
//方法一客户端实现
string type;
Console.WriteLine("请输入要求面积的图形形状：");
type = Console.ReadLine();
SimpleShapeFactory factory = new SimpleShapeFactory();
ShapeArea a = new ShapeArea(factory);
a.getShapeArea(type);
//方法二客户端实现
ShapeFactory TriShapeFactory = new TriShapeFactory();
Shape TriShapeArea = TriShapeFactory.CreatShape();
TriShapeArea.area();
ShapeFactory SquShapeFactory = new SquShapeFactory();
Shape SquShapeArea = SquShapeFactory.CreatShape();
SquShapeArea.area();
ShapeFactory RecShapeFactory = new RecShapeFactory();
Shape RecShapeArea = RecShapeFactory.CreatShape();
RecShapeArea.area();
ShapeFactory CirShapeFactory = new CirShapeFactory();
Shape CirShapeArea = CirShapeFactory.CreatShape();
CirShapeArea.area();
//总结：对于这个作业，其实简单工厂模式很高效，用工厂模式反而复杂化了，工厂模式更多的应用于更复杂的问题：
//举个例子，pizza，分地区，每个地区又有不同口味，这样，抽象工厂类，地区类继承工厂，地区类里creat方法选择口味，这样地区类和口味类就成了一个简单工厂模式
//每个地区类继承父类，这样就是工厂模式了
//还可以利用反射机制
}
public ShapeArea(SimpleShapeFactory factory)
{
this.factory = factory;
}