Printing wide unicode character with ncurses
I am trying to position an asterisk star symbol on the screen using a library ncurses.h
in C on Ubuntu. The code I'm trying to run is the following:
#include <stdio.h>
#include <wchar.h>
#include <curses.h>
#include <ncurses.h>
#include <stdlib.h>
#include <wctype.h>
#include <locale.h>
int main() {
setlocale(LC_CTYPE, "");
initscr();
cbreak();
WINDOW *win = newwin(0, 0, 0, 0);
refresh();
wrefresh(win);
const wchar_t* star = L"0x2605";
mvaddwstr(3, 3, star);
getch();
endwin();
}
But I keep getting the error
implicit declaration of function ‘mvaddwstr’ [-Wimplicit-function-declaration]
Even though this feature is well documented here along with similar features I can't get it either. Is there some library I am not including to make this work? or is there an alternative way to show this symbol? I appreciate any help.
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1 answer
You should compile against "narrow" curses (ncurses vs ncursesw)
I was able to compile your example on ubuntu 16.04 with the following:
apt install libncursesw5-dev
# --cflags expanded to: -D_GNU_SOURCE -I/usr/include/ncursesw
gcc main.c $(ncursesw5-config --cflags) -c
# --libs expanded to: -lncursesw -ltinfo
gcc main.o $(ncursesw5-config --libs) -o main
And then
./main
I had to do the following code and in your example code:
- const wchar_t* star = L"0x2605";
+ const wchar_t* star = L"\x2605";
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