c++ - Output between two whitespaces -

i have string: system->ondrashek: nick aaasssddd není v žádné místnosti , need aaasssddd output string. output not same each time. must 2 whitespaces. tried substr or split, knowledge of c++ poor.

i find code:

   #include <string>    #include <iostream>     int main()    {     const std::string str = "system->ondrashek: nick aaasssddd není v žádné        místnosti";      size_t pos = str.find(" ");     if (pos == std::string::npos)     return -1;      pos = str.find(" ", pos + 1);     if (pos == std::string::npos)     return -1;      std::cout << str.substr(pos, std::string::npos);    } 

but not, need.

i assume want third word given string.

you have find second space, output sub-string second space end of string.

instead, need find third space, , output sub-string between 2 spaces.

so here modification.

#include <string> #include <iostream>  int main() {     const std::string str = "system->ondrashek: nick aaasssddd není v žádné        místnosti";      size_t pos = str.find(" ");     size_t start;     size_t end;     if (pos == std::string::npos)         return -1;      pos = str.find(" ", pos + 1);     if (pos == std::string::npos)         return -1;      start = pos + 1;      pos = str.find(" ", pos + 1);     if (pos == std::string::npos)         return -1;      end = pos;      std::cout << str.substr(start, end - start) << std::endl; }