C++ 用C++中的空格分割字符串
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Splitting a string by whitespace in c++
提问by Brian
Possible Duplicates:
C++: How to split a string?
Splitting a string
可能的重复项：
C++：如何拆分字符串？
拆分字符串
What is the best way to go about splitting a string up by whitespace in c++?
在 C++ 中用空格拆分字符串的最佳方法是什么？
I'd like to be able to split it based on tab, space, etc. and of course ignore multiple tabs/spaces/etc. in a row as well as not have issues with having those things at the end.
我希望能够根据制表符、空格等进行拆分，当然可以忽略多个制表符/空格/等。连续，并且在最后拥有这些东西时没有问题。
Ultimately, I am going to end up storing this in a vector, but I can easily convert between data types if there is some easy built-in standard library way of splitting.
最终，我最终将把它存储在一个向量中，但如果有一些简单的内置标准库分割方式，我可以轻松地在数据类型之间进行转换。
I am building this on a UNIX machine with g++, notusing Microsoft Visual C++
我正在使用 g++ 的 UNIX 机器上构建它，而不是使用 Microsoft Visual C++
回答by Jerry Coffin
It may be open to question whether it's best, but one really easyway to do this is to put your string into a stringstream, then read the data back out:
是否最好可能还有待商榷，但一种非常简单的方法是将您的字符串放入字符串流中，然后将数据读回：
// warning: untested code.
std::vector<std::string> split(std::string const &input) {
std::istringstream buffer(input);
std::vector<std::string> ret;
std::copy(std::istream_iterator<std::string>(buffer),
std::istream_iterator<std::string>(),
std::back_inserter(ret));
return ret;
}
If you prefer, you can initialize the vectordirectly from the iterators:
如果您愿意，可以vector直接从迭代器初始化：
std::vector<std::string> split(std::string const &input) {
std::istringstream buffer(input);
std::vector<std::string> ret((std::istream_iterator<std::string>(buffer)),
std::istream_iterator<std::string>());
return ret;
}
Either should work with any reasonable C++ compiler. With C++11, you can clean up the second version a little bit by using brace-initialization instead:
两者都应该与任何合理的 C++ 编译器一起使用。使用 C++11，您可以通过使用大括号初始化来稍微清理第二个版本：
std::vector<std::string> ret{std::istream_iterator<std::string>(buffer),
std::istream_iterator<std::string>()};
回答by Brian
This is what I use:
这是我使用的：
/* Tokenizing a string */
std::vector<std::string> Parser::tokenizer( const std::string& p_pcstStr, char delim ) {
std::vector<std::string> tokens;
std::stringstream mySstream( p_pcstStr );
std::string temp;
while( getline( mySstream, temp, delim ) ) {
tokens.push_back( temp );
}
return tokens;
}
Your delim would be a whitespace, p_pcstStr would be the string to tokenize and the return would be a vector with all strings which have a whitespace in between.
您的 delim 将是一个空格， p_pcstStr 将是要标记的字符串，返回将是一个向量，其中所有字符串之间都有一个空格。
