static void Main(string[] args)
{
Console.WriteLine("请输入你要选购的歌手名称");
String arg = Console.ReadLine();
Console.WriteLine("请输入你要选购的专辑数量");
int num = 0;
try{
num = Convert.ToInt32(Console.ReadLine());
}catch (System.FormatException e) {
Console.WriteLine(e.Message);
}
Singer singer = CdShopPurchase.PurchaseAlbum(arg);
if (singer != null)
{
singer.PurchaseCost(num);
}
}
public static Singer PurchaseAlbum(String arg)
{
Singer singer = null;
if (arg.ToLower() == "taylor swift")
{
singer = new TaylorSwift();
}
else if (arg.ToLower() == "ed sheeran")
{
singer = new EdSheeran();
}
else if (arg.ToLower() == "maroon 5")
{
singer = new Maroon5();
}
else
{
Console.WriteLine("We don't have the album you requested.");
}
return(singer);
}
