static void Main(string[] args)
{
try
{
Console.WriteLine("请输入你所要求的图形的英文名称：");
IChart chart = ChartFactory.GetChart(Console.ReadLine());
chart.display();
}
catch
{
Console.WriteLine("请输入标准");
}
}
static void Main(string[] args)
{
Chart chart_1 = ChartFactory.GetChart("triangle");
chart_1.display();
Chart chart_2 = ChartFactory.GetChart("circle");
chart_2.display();
Chart chart_3 = ChartFactory.GetChart("square");
chart_3.display();
Chart chart_4 = ChartFactory.GetChart("rectangle");
chart_4.display();
}