Free Knowledge Resources


Linux Manual Pages


Free Software * Books

Source Code

Free Media

Linux

printw(3ncurses)


NAME

   printw, wprintw, mvprintw, mvwprintw, vwprintw, vw_printw - print
   formatted output in curses windows

SYNOPSIS

   #include <curses.h>

   int printw(const char *fmt, ...);
   int wprintw(WINDOW *win, const char *fmt, ...);
   int mvprintw(int y, int x, const char *fmt, ...);
   int mvwprintw(WINDOW *win, int y, int x, const char *fmt, ...);
   int vwprintw(WINDOW *win, const char *fmt, va_list varglist);
   int vw_printw(WINDOW *win, const char *fmt, va_list varglist);

DESCRIPTION

   The printw, wprintw, mvprintw and mvwprintw routines are  analogous  to
   printf  [see printf(3)].  In effect, the string that would be output by
   printf is output instead as though  waddstr  were  used  on  the  given
   window.

   The  vwprintw  and  wv_printw  routines  are  analogous to vprintf [see
   printf(3)] and perform a wprintw using a variable argument  list.   The
   third  argument  is  a  va_list,  a  pointer to a list of arguments, as
   defined in <stdarg.h>.

RETURN VALUE

   Routines that return an integer return ERR upon failure  and  OK  (SVr4
   only  specifies  "an  integer  value  other  than ERR") upon successful
   completion.

   X/Open defines no error conditions.  In this implementation,  an  error
   may be returned if it cannot allocate enough memory for the buffer used
   to format the results.  It will return an error if the  window  pointer
   is null.

   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.

PORTABILITY

   The  XSI  Curses  standard,  Issue  4  describes  these functions.  The
   function vwprintw is marked TO BE WITHDRAWN, and is to be replaced by a
   function  vw_printw  using  the  <stdarg.h> interface.  The Single Unix
   Specification,  Version  2  states  that  vw_printw   is  preferred  to
   vwprintw  since the latter requires including <varargs.h>, which cannot
   be used in the same  file  as  <stdarg.h>.   This  implementation  uses
   <stdarg.h> for both, because that header is included in <curses.h>.

SEE ALSO

   ncurses(3NCURSES), printf(3), vprintf(3)

                                                          printw(3NCURSES)



Opportunity


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.



Free Software


Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.



Free Books


The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.



Education


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.


birds banner