public void Interpret(PlayContext context)
{
if (context.PlayText.Length > 0)
{
string playKey = context.PlayText.Substring(0, 1);
context.PlayText = context.PlayText.Substring(2);
double playValue = Convert.ToDouble(context.PlayText.Substring(0, context.PlayText.IndexOf(" ")));
context.PlayText = context.PlayText.Substring(context.PlayText.IndexOf(" ") + 1);
Excute(playKey, playValue);
}
}
/// <summary>
/// 解释器模式
/// </summary>
/// <param name="args"></param>
static void Main(string[] args)
{
//Context context=new Context();
//IList<AbstractExpression> list=new List<AbstractExpression>();
//list.Add(new TerminalExpression());
//list.Add(new TerminalExpression());
//list.Add(new NonterminalExpression());
//list.Add(new NonterminalExpression());
//foreach (var var in list)
//{
// var.Interpret(context);
//}
PlayContext context = new PlayContext();
//音乐-上海滩
Console.WriteLine("上海滩：");
context.PlayText = "T 500 O 2 E 0.5 A 3 E 0.5 G 0.5 D 3 E 0.5 G 0.5 A 0.5 O 3 C 1 O 2 A 0.5 G 1 C 0.5 E 0.5 D 3 ";
Expression expression = null;
try
{
while (context.PlayText.Length > 0)
{
string str = context.PlayText.Substring(0, 1);
switch (str)
{
case "O":
expression = new Scale();
break;
case "T":
expression = new Speed();
break;
case "C":
case "D":
case "E":
case "F":
case "G":
case "A":
case "B":
expression = new Note();
break;
}
expression.Interpret(context);
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
Console.Read();
}