static void Main(string[] args)
{
//何时使用： 1、客户端不需要知道系统内部的复杂联系，整个系统只需提供一个"接待员"即可。 2、定义系统的入口。
ShapeMaker shapeMaker = new ShapeMaker();
shapeMaker.DrawRectangle();
shapeMaker.DrawSquare();
Console.ReadKey();
}
static void Main(string[] args)
{
Facade facade = new Facade();
Console.WriteLine(facade.OrderFood());
ShapeMaker shapeMaker = new ShapeMaker();
Console.WriteLine(shapeMaker.DrawSquare());
Console.WriteLine(shapeMaker.DrawRectangle());
Console.WriteLine(shapeMaker.DrawSquare());
}