How to write utf-8 string to console?

I'm trying to parse a XML file with UTF-8 encoded, I have figure out how to use Parser.XML module and it works fine.

But there is a problem, I can't write the UTF-8 string I read from the file, but I could use GTK2 module to display those string.

When I tried use write() to let it display on console, Pike compilan: ================================================= Stdio.File->write(): cannot output wide strings. _static_modules.files()->Fd: Fd(1)->write("\110112\61062\n") aa.pike:21: /home/brianhsu/aa()->main() =================================================

And when I use those string at the GTK2.Lable->create() , it also says : ================================================= Bad argument 1 to create(). Expected string (8bit). =================================================

But I can first create an empty label, then use set_text() to set the conent of the label.

Where should I check my code?

My XML file: http://stu.im.ncnu.edu.tw/~brianhsu/test.xml

Here is my code,I commemted out the code that have these problem. =================================================

import Parser.XML;

int main () { string xml = Stdio.read_file ( "test.xml" );

Tree.Node root = Tree.parse_input ( xml ); string test = root->get_children()[1]->get_tag_name();

GTK2.gtk_init(); GTK2.Window win = GTK2.Window( GTK2.WINDOW_TOPLEVEL );

win->set_default_size ( 320 , 240 );

// Faild //GTK2.Label lab = GTK2.Label ( test );

// Faild //write ( test + "\n" );

GTK2.Label lab = GTK2.Label ( "" );

lab->set_text ( test ); win->set_title ( test );

win->add ( lab ); win->show_all();

return -1;

} ===================================================