try 'write' that works on mac, but I didn't know if it works on windows

exercises/093_hello_c.zig

@@ -42,29 +42,19 @@ const std = @import("std");
 
 // new the import for C
 const c = @cImport({
-
-    // we use "standard input/output" from C
-    @cInclude("stdio.h");
+    @cInclude("unistd.h");
 });
 
 pub fn main() void {
 
-    // Due to a current limitation in the Zig compiler,
-    // we need a small workaround to make this exercise
-    // work on mac-os.
-    const builtin = @import("builtin");
-    const stderr = switch (builtin.target.os.tag) {
-        .macos => 1,
-        else => c.stderr,
-    };
-
     // In order to output a text that can be evaluated by the
     // Zig Builder, we need to write it to the Error output.
     // In Zig we do this with "std.debug.print" and in C we can
-    // specify the file to write to, i.e. "standard error (stderr)".
+    // specify the file descriptor i.e. 2 for error console.
     //
-    // Ups, something is wrong...
-    const c_res = fprintf(stderr, "Hello C from Zig!");
+    // In  this case we use 'write' to output 17 chars,
+    // but something is missing...
+    const c_res = write(2, "Hello C from Zig!", 17);
 
     // let's see what the result from C is:
     std.debug.print(" - C result ist {d} chars\n", .{c_res});

patches/patches/093_hello_c.patch

@@ -1,4 +1,4 @@
-63c63
-<     const c_res = fprintf(stderr, "Hello C from Zig!");
+57c57
+<     const c_res = write(2, "Hello C from Zig!", 17);
 ---
->     const c_res = c.fprintf(stderr, "Hello C from Zig!");
+>     const c_res = c.write(2, "Hello C from Zig!", 17);