void showInstalled(){Console.WriteLine("installed recognizers");foreach (var i in SpeechRecognitionEngine.InstalledRecognizers()){Console.WriteLine(String.Format("{0}\t{1}\t{2}\t{3}\n", i.Id, i.Name, i.Culture, i.Description));}}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Speech;
using System.Speech.Recognition;
using System.Globalization;
using System.Windows.Forms;
using System.Speech.Synthesis;
public class Haha
{static void Main(){new Haha();}SpeechRecognitionEngine recognizer = new SpeechRecognitionEngine();int x, y, z;SpeechSynthesizer cout = null;Haha(){recognizer.SpeechRecognized += new EventHandler<SpeechRecognizedEventArgs>(recognizer_SpeechRecognized);recognizer.SetInputToDefaultAudioDevice();String s = "0";for (int i = 1; i <= 9; i++) s += " " + i;GrammarBuilder num = new GrammarBuilder(new Choices(s.Split(new char[] { ' ' })));num = new GrammarBuilder(num, 1, 4);Choices all = new Choices();all.Add(num);all.Add("再说一遍");recognizer.LoadGrammarAsync(new Grammar(all));run();}void run(){cout = new SpeechSynthesizer();Random random = new Random();while (true){x = random.Next(11, 99);y = random.Next(11, 99);z = -1;cout.Speak(x + "成以" + y);recognizer.RecognizeAsync(RecognizeMode.Multiple);while (true){if (z != -1){if (z == x * y){cout.Speak("正确，真聪明");break;}else{cout.Speak(String.Format("不是{0}，再算！",z));z = -1;}}}recognizer.RecognizeAsyncStop();}}void recognizer_SpeechRecognized(object sender, SpeechRecognizedEventArgs e){string text = e.Result.Text;Console.WriteLine(text);if (text == "再说一遍"){cout.Speak(x + "成以" + y);return;}try{z = int.Parse(text);}catch{z = -1;}}
}