fwrite with non ASCII characters

Question

Consider the following program:

#include <stdio.h>
#include <string.h>

int main() {
  char* alpha = "Ω";
  fwrite(alpha, 1, strlen(alpha), stdout);
  return 0;
}

On Windows I get the following output:

��

I tried changing the line to this:

char* alpha = "zΩ";

and it prints correctly. The output is encoded correctly, just not printing correctly:

$ bad | od -tx1c
0000000  ce  a9
        316 251

$ good | od -tx1c
0000000  7a  ce  a9
          z 316 251

How can I use fwrite with non ASCII as the first character?

To response to some comments: The source file is correctly formatted as UTF-8, and my code page is also correctly set as UTF-8:

$ chcp.com
Active code page: 65001

Answer 1

On Windows fwrite calls WriteFile internally, in this case incorrectly. My solution was to just call WriteFile directly:

#include <windows.h>

int main() {
  char* alpha = "Ω";
  DWORD bravo;
  WriteFile(GetStdHandle(STD_OUTPUT_HANDLE), alpha, strlen(alpha), &bravo, 0);
  return 0;
}

• Win32 Equivalents for C Run-Time Functions
• WriteFile function