的转义序列？在 c++
我正在查看 C++ 中字符串中字符的转义序列，我注意到问号有一个转义序列。有人能告诉我这是为什么吗？这看起来有点奇怪，我不明白是什么？在字符串中执行。谢谢。
I was looking at the escape sequences for characters in strings in c++ and I noticed there is an escape sequence for a question mark. Can someone tell me why this is? It just seems a little odd and I can't figure out what ? does in a string. Thanks.
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这是为了防止问号被误解为三字母组的一部分。
例如，在
“??!”中，将被解释为
|字符。因此，您必须按如下方式转义问号：http://msdn.microsoft.com/en-us/library/bt0y4awe%28VS.80%29。 ASPX
It's to keep a question mark from getting misinterpreted as part of a trigraph.
For example, in
The "??! would be interpreted as the
|character. So, you have to escape the question marks as follows:Example complements of http://msdn.microsoft.com/en-us/library/bt0y4awe%28VS.80%29.aspx