/in/P5.cpp: In function 'int main()':
/in/P5.cpp:17:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while (start < str.length())
            ~~~~~~^~~~~~~~~~~~~~
/in/P5.cpp:19:54: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (end = start + 1; str[end] != ' ' && end < str.length(); ++end);
                                                  ~~~~^~~~~~~~~~~~~~
/in/P5.cpp:38:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for ( i=0; i<vint.size(); i++) cout << vint[i] << " "; // vint is the vector containing the array
                ~^~~~~~~~~~~~