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  1. using System;
  2.  
  3. public class Test
  4. {
  5.     static int GetWordCount(string text)
  6.     {
  7.         int wordCount = 0, index = 0;
  8.  
  9.         // skip whitespace until first word
  10.         while (index < text.Length && char.IsWhiteSpace(text[index]))
  11.             index++;
  12.  
  13.         while (index < text.Length)
  14.         {
  15.             // check if current char is part of a word
  16.             while (index < text.Length && !char.IsWhiteSpace(text[index]))
  17.                 index++;
  18.  
  19.             wordCount++;
  20.  
  21.             // skip whitespace until next word
  22.             while (index < text.Length && char.IsWhiteSpace(text[index]))
  23.                 index++;
  24.         }
  25.  
  26.         return wordCount;
  27.     }
  28.  
  29.     private static void AssertWordCount(int expectedCount, string input)
  30.     {
  31.         var actual = GetWordCount(input);
  32.         if (actual != expectedCount)
  33.             throw new Exception(string.Format("Input '{0}': expected {1}, but got {2}",
  34.                 input, expectedCount, actual));
  35.     }
  36.  
  37.     public static void Main()
  38.     {
  39.         foreach (var test in new[] { "", " ", "   " })
  40.         {
  41.             AssertWordCount(0, test);
  42.         }
  43.  
  44.         foreach (var test in new[] { "test", " test", "test ", " test " })
  45.         {
  46.             AssertWordCount(1, test);
  47.         }
  48.  
  49.         foreach (var test in new[] { "a b", " a b", "a b ", " a b " })
  50.         {
  51.             AssertWordCount(2, test);
  52.         }
  53.  
  54.         Console.WriteLine("Passed without exceptions");
  55.     }
  56. }
Success #stdin #stdout 0s 131520KB
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stdin
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Standard input is empty
stdout
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Passed without exceptions
https://ideone.com/L9EXlh
language:
C# (gmcs 5.20.1)
created:
5 years ago
visibility:
public

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