How to fix UTF-8 with cyrillic problem in my code?

September 8, 2024

#include <iostream>
#include <windows.h>
#include <locale.h>
#include <locale>

using namespace std;

int main()
{
    setlocale(LC_ALL, ".UTF-8");
    locale global(locale(".UTF-8"));

    const float Pi = 3.14;

    float r, h;
    
    cout << "Введіть довжину (r): ";
    cin >> r;

    cout << "Введіть висоту (h): ";
    cin >> h;


    float d, s, v, sb;

    d = 2 * r;
    sb = 2 * Pi * r * h;
    s = 2 * Pi * r*(r + h);
    v = Pi * pow(r, 2) * h; 

    cout << "d = " << d << "\nSбіч = " << sb << "\nS= "<< s <<"\nV= " << v;

    return 0;

}

(English Win11)

I tried:

setlocale (LC_ALL, "ukr";

and

setlocale (LC_ALL, ".UTF-8");
locale global(locale(".UTF-8"));

and

Save documents as Unicode when data cannot be saved in codepage checkbox

and also

edit my region settings.

But nothing of this wont work

>Solution :

This works for me

#include <io.h>
#include <fcntl.h>
#include <iostream>

int main() {
    _setmode(_fileno(stdout), _O_U16TEXT);
    std::wcout << L"Введіть довжину (r):\n";
    return 0;
}

It’s the simple way to print Unicode characters on Windows. Put the stream into _O_U16TEXT mode and use wide strings L"..." and wide streams std::wcout.