Splitting a C std string using tokens e g

Question

Possible Duplicate    How to split a string in C          Best way to split a string in C    The string can be assumed to be composed of words separated by    From our guide lines point of view C string functions are not allowed and also Boost is also not allowed to use because of security conecerns open source is not allowed   The best solution I have right now is   string str  denmark sweden india us      Above str should be stored in vector as strings  how can we achieve this   Thanks for inputs

User · Answer

You could use a string stream and read the elements into the vector.

Here are many different examples...

A copy of one of the examples:

std::vector<std::string> split(const std::string& s, char seperator)
{
   std::vector<std::string> output;

    std::string::size_type prev_pos = 0, pos = 0;

    while((pos = s.find(seperator, pos)) != std::string::npos)
    {
        std::string substring( s.substr(prev_pos, pos-prev_pos) );

        output.push_back(substring);

        prev_pos = ++pos;
    }

    output.push_back(s.substr(prev_pos, pos-prev_pos)); // Last word

    return output;
}

User · Answer

There are several libraries available solving this problem  but the simplest is probably to use Boost Tokenizer    include  lt iostream gt   include  lt string gt   include  lt boost tokenizer hpp gt   include  lt boost foreach hpp gt   typedef boost  tokenizer lt boost  char separator lt char gt   gt  tokenizer   std  string str  denmark sweden india us    boost  char separator lt char gt  sep       tokenizer tokens str  sep    BOOST FOREACH std  string const amp  token  tokens        std  cout  lt  lt    lt    lt  lt   tok iter  lt  lt    gt     lt  lt    n

User · Answer

I find std  getline   is often the simplest  The optional delimiter parameter means it s not just for reading  lines     include  lt sstream gt   include  lt iostream gt   include  lt vector gt   using namespace std   int main         vector lt string gt  strings      istringstream f  denmark sweden india us        string s          while  getline f  s                  cout  lt  lt  s  lt  lt  endl          strings push back s

[c++] Splitting a C++ std::string using tokens, e.g. ";"

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