如何检查单词计数是否不存在？ [英] How do I check to see if a word count doesn't exist?

问题描述

我正在用Visual Basic编写一个程序，用它来检查字符串的第一个单词，string.Substring（0，string.IndexOf（））。它工作得很好，但我发现了一个简单的漏洞利用程序错误。如果输入的字符串只是一串没有任何字母的符号，那么它就会出错。我如何重写它以防止这种情况？谢谢！ ：D

解决方案

吨类似问题 [ ^ ]之前已被询问过。检查其中一个 [ ^ ]。



请参阅此提示：不要计算空格数字。 [ ^ ]

I'm writing a program in visual basic that uses this to check the first word of a string, " string.Substring(0, string.IndexOf(" ")) " . It works great, but I found an easy exploit that errors out the program. If the entered string is just a bunch of symbols without any letters, then it errors out. How would I rewrite it to prevent this? Thanks! :D

解决方案

Tons of similar questions[^] have been asked before. Check one of them[^].

Please, see this tip too: Don't count spaces when counting words.[^]

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