Вопросы по типу char

#include <iostream>
 
int main(){
    char c;
    std::cin >> c;
    std::cout << "the value of'" << c << "' is " << int(c) << '\n';
}

#include <iostream>
using namespace std;
int main(){
    char c;
    signed char sc;
    unsigned char usc;
    wchar_t wc;
    do{
        cin >> c;
        sc = c;
        usc = c;
        wc = c; 
        cout << "the value of '" << c << "' is " << int(c) << '\n';
        cout << "the signed value of '" << c << "' is " << int(sc) << '\n';
        cout << "the unsigned value of '" << c << "' is " << int(usc) << '\n';
        cout << "the wide value of '" << c << "' is " << int(wc) << '\n';
    }while(c != 'q');
}

#include <iostream>
using namespace std;
int main(){
    wchar_t wc;
    do{
        wcin >> wc;
        cout << "the wide value of'" << wc << "' is " << int(wc) << '\n';
    }while((char)wc != 'q');
}

#include <iostream>
using namespace std;
int main(){
    wchar_t wc;
    while(wcin >> wc){
        wcout << "the wide value of'" << wc << "' is " << int(wc) << '\n';
    }
}

#include <locale>
//...
locale::global( locale("") ); //после int main()

#include <iostream>
#include <cstdlib>
using namespace std;
int main(){
    locale l(getenv("LANG"));
    locale::global(l);
    wchar_t wc;
    while(wcin >> wc){
        wcout << "the wide value of'" << wc << "' is " << int(wc) << '\n';
    }
}