Print Unicode characters in C, using ncurses

Question

I have to draw a box in C, using ncurses;

First, I have defined some values for simplicity:

#define RB \"\\e(0\\x6a\\e(B\"  (ASCII 188,Right bottom,          


        

Answer 1

ncurses defines the values ACS_HLINE, ACS_VLINE, ACS_ULCORNER, ACS_URCORNER, ACS_LLCORNER and ACS_LRCORNER. You can use those constants in addch and friends, which should result in your seeing the expected box characters. (There's lots more ACS characters; you'll find a complete list in man addch.)

ncurses needs to know what it is drawing because it needs to know exactly where the cursor is all the time. Outputting console control sequences is not a good idea; if ncurses knows how to handle the sequence, it has its own abstraction for the feature and you should use that abstraction. The ACS ("alternate character set") defines are one of those abstractions.