Invalid localized chars in a text file

Question

I learn the C language. I need to create some text file with Unicode data. I have wrote such code:

#include<stdio.h>
#include<stdlib.h>
#include<wchar.h>

int main(int argc, char *argv[]) {

    wchar_t *s1 = L"Привет, мир!\n";
    wchar_t *s2 = L"Hello, World!";

    FILE *fp = fopen("./hello.txt", "w");

    fputws(s1, fp);
    fputws(s2, fp);

    fclose(fp);

    exit(EXIT_SUCCESS);
}

But I get such result:

??????, ???!
Hello, World!

Why I don't get the Russian chars?

Answer 1

It is possible that you are having a problem with the locales in the terminal you are running the program. If it is so, you only have to set the locale like this:

setlocale(LC_CTYPE,"");

More information here