#include <string>
#include <iostream>
using std::string; using std::cout; using std::endl;

int main(int argc, char const *argv[])
{
    string s("some string");

    // if (s.begin() != s.end())
    // {
    //     auto it = s.begin();
    //     *it = toupper(*it);
    // }

    for (auto it = s.begin(); it != s.end() && !isspace(*it); ++it)
    {
        *it = toupper(*it); // capitalize the current character
    }
    

    cout << (s) << endl;

    return 0;
}