Scroll to navigation

addstr(3NCURSES) addstr(3NCURSES)


addstr, addnstr, waddstr, waddnstr, mvaddstr, mvaddnstr, mvwaddstr, mvwaddnstr - add a string of characters to a curses window and advance cursor


#include <curses.h>
int addstr(const char *str);

int addnstr(const char *str, int n);
int waddstr(WINDOW *win, const char *str);
int waddnstr(WINDOW *win, const char *str, int n); int mvaddstr(int y, int x, const char *str);
int mvaddnstr(int y, int x, const char *str, int n);
int mvwaddstr(WINDOW *win, int y, int x, const char *str);
int mvwaddnstr(WINDOW *win, int y, int x, const char *str, int n);


These functions write the (null-terminated) character string str on the given window. It is similar to calling waddch once for each byte in the string.

The mv functions perform cursor movement once, before writing any characters. Thereafter, the cursor is advanced as a side-effect of writing to the window.

The four functions with n as the last argument write at most n bytes, or until a terminating null is reached. If n is -1, then the entire string will be added.


All functions return the integer ERR upon failure and OK on success.

X/Open does not define any error conditions. This implementation returns an error

  • if the window pointer is null or
  • if the string pointer is null or
  • if the corresponding calls to waddch return an error.

Functions with a “mv” prefix first perform a cursor movement using wmove, and return an error if the position is outside the window, or if the window pointer is null. If an error is returned by the wmove, no characters are added to the window.

If an error is returned by waddch (e.g., because the window is not large enough, or an illegal byte sequence was detected) only part of the string may be added. Aside from that, there is a special case in waddch where an error may be returned after successfully writing a character to the lower-right corner of a window when scrollok is disabled.


All of these functions except waddnstr may be macros.


These functions are described in the XSI Curses standard, Issue 4.


ncurses(3NCURSES), addch(3NCURSES).