curs_addch: addch, waddch, mvaddch, mvwaddch, echochar, wechochar --
add a character (with attributes) to a curses window and advance cursor
cc [flag . . .] file -locurses [library . . .]
int addch(chtype ch);
int waddch(WINDOW win, chtype ch);
int mvaddch(int y, int x, chtype ch);
int mvwaddch(WINDOW win, int y, int x, chtype ch);
int echochar(chtype ch);
int wechochar(WINDOW win, chtype ch);
The addch, waddch, mvaddch, and
mvwaddch routines put the character ch
into the window at the current cursor position of the window and
advance the position of the window cursor.
Their function is similar to that of putchar.
At the right margin, an automatic newline is performed.
At the bottom of the scrolling region, if scrollok
is enabled, the scrolling region is scrolled up one line.
If ch is a tab, newline, or backspace, the cursor is moved appropriately
within the window.
A newline also does a clrtoeol before moving.
Tabs are considered to be at every eighth column.
is another control character, it is drawn in the ^X notation.
after adding a control character does not return the control character, but
instead returns the representation of the control character.
Video attributes can be combined with a character by OR-ing them
into the parameter.
This results in these attributes also being set.
(The intent here is that text, including attributes, can be
copied from one place to another using inch and addch.)
[see standout, predefined video attribute constants, on
The echochar and wechochar routines are
functionally equivalent to a call to addch followed by a call to
refresh, or a call to waddch followed by a call to
The knowledge that only a single character is being output is
taken into consideration and, for non-control characters, a considerable
performance gain might be seen by using these routines instead of their
The following variables may be used to add line drawing characters to the
screen with routines of the addch family.
When variables are defined for the terminal, the A_ALTCHARSET bit
is turned on [see
Otherwise, the default character listed below is stored in the variable.
The names chosen are consistent with the VT100 nomenclature.
upper left-hand corner
lower left-hand corner
upper right-hand corner
lower right-hand corner
right tee (-|)
left tee (|-)
bottom tee (_|)
top tee (|)
scan line 1
scan line 9
checker board (stipple)
arrow pointing left
arrow pointing right
arrow pointing down
arrow pointing up
board of squares
solid square block
All routines return the integer ERR upon
failure and an integer value other than ERR
upon successful completion,
unless otherwise noted in the preceding routine descriptions.