// 解释器
public void Interpret(PlayContext context)
{
if (string.IsNullOrWhiteSpace(context.PlayText))
{
return;
}
var playKey = context.PlayText.Substring(0, 1);
context.PlayText = context.PlayText.Substring(2);
var playValue =
Convert.ToDouble(context.PlayText.Substring(0, context.PlayText.IndexOf(" ", StringComparison.Ordinal)));
context.PlayText = context.PlayText.Substring(context.PlayText.IndexOf(" ", StringComparison.Ordinal) + 1);
Excute(playKey, playValue);
}
static void Main(string[] args)
{
PlayContext context = new PlayContext();
context.PlayText =
"T 500 O 2 E 0.5 G 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 (!string.IsNullOrWhiteSpace(context.PlayText))
{
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":
case "P":
expression = new Note();
break;
}
expression.Interpret(context);
}
}
catch (Exception exception)
{
Console.WriteLine(exception.Message);
}
Console.ReadKey(true);
}
