vb.net 计算字符串中的单词
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Counting the Words in a String
提问by Programming Noob
I'm taking an introductory programming class that goes over Visual Basic and I need some help with an assignment if you all would be so kind as to point me in the right direction. It's sort of a challenge assignment and I'm supposed to figure out how to do these things by myself but I haven't been able to find anything on this.
我正在学习一门关于 Visual Basic 的介绍性编程课程，如果你们愿意为我指明正确的方向，我需要一些关于作业的帮助。这是一项具有挑战性的任务，我应该弄清楚如何自己做这些事情，但我一直无法找到任何关于此的信息。
What I have to do is have a program count the number of words in a string and then print this number. I've look online to no avail, and I haven't learned how to do anything similar in class. Any help that you all could offer me would be greatly appreciated. I know you don't like homework assignments, but I am truly lost on this one.
我要做的是让一个程序计算字符串中的单词数，然后打印这个数字。我在网上看无济于事，我还没有学会如何在课堂上做类似的事情。你们可以为我提供的任何帮助将不胜感激。我知道你不喜欢家庭作业，但我真的迷失在这个作业上。
回答by Bathsheba
A starting point, in VBA at least (and VB has similar functions but I don't know which version you're using), is to use VBA.Split; e.g.
一个起点，至少在 VBA 中（和 VB 有类似的功能，但我不知道你使用的是哪个版本），是使用 VBA.Split；例如
VBA.Split(s, " ") where s is the string to split and " " the delimiter (we're assuming, crudely, that all words are separated by spaces).
VBA.Split(s, " ") 其中 s 是要拆分的字符串，而 " " 是分隔符（我们粗略地假设所有单词都用空格分隔）。
This function returns a string array. You can use the UBound and LBound functions to get the size of the array. E.g.
此函数返回一个字符串数组。您可以使用 UBound 和 LBound 函数来获取数组的大小。例如
Sub test()
Dim s As String
Dim arr() As String
arr = VBA.Split("Hello there", " ")
Debug.Print UBound(arr) - LBound(arr) + 1
End Sub
This will print 2.
这将打印 2。
Happy coding!
快乐编码！
回答by Placeholder
OK, let us say your string is like:
好的，让我们说你的字符串是这样的：
string ThisIsYourSentence = "This is some pretty long and annoying sentence, now, isn't it?";
You notice that each word is divided from the other by an interval " ". In C# there is a built-in method which do separate strings inside a string, by checking for a special character which divides them:
您会注意到每个单词都被间隔“ ”分开。在 C# 中，有一个内置方法可以在字符串中分离字符串，通过检查将它们分开的特殊字符：
For your solution you just have to create a new array, which each time when the " " character is met, will fill in with a word.
对于您的解决方案，您只需要创建一个新数组，每次遇到“”字符时，都会用一个单词填充。
string[] TheseAreYourWords = ThisIsYourSentence.Split(' ');
P.S: Oh, sorry, I didn't even see you meant VisualBasic, not C#.
PS：哦，抱歉，我什至没有看到您指的是 VisualBasic，而不是 C#。
回答by Kuzgun
you can call a function like this:
你可以调用这样的函数：
Public Function CountWords(ByVal value As String) As Integer
' Count matches.
Dim collection As MatchCollection = Regex.Matches(value, "\S+")
Return collection.Count
End Function
or split the given string with space character and get length of array.
或者用空格字符分割给定的字符串并获取数组的长度。
