Deprecate printf, puts, and scanf. Make fputs a M-file. * libinterp/corefcn/file-io.cc: extracted printf, puts, and scanf to M-files. * scripts/deprecated/printf.m: new function, equivalent to version file-io.cc. * scripts/deprecated/puts.m: new function, equivalent to version file-io.cc. * scripts/deprecated/scanf.m: new function, equivalent to version file-io.cc. * scripts/deprecated/module.mk: added printf, puts, and scanf. * scripts/io/fputs.m: new function, equivalent to version file-io.cc. * scripts/io/module.mk: added fputs. * doc/interpreter/io.txi: adapted documentation to current implementation. * NEWS: announced changes. * doc/interpreter/basics.txi: replaced printf by fprintf. * doc/interpreter/stmt.txi: replaced printf by fprintf. * doc/interpreter/var.txi: replaced printf by fprintf. * doc/refcard/refcard.tex: removed printf and scanf. * examples/code/@FIRfilter/display.m: replaced printf by fprintf. * examples/code/@polynomial/display.m: replaced printf by fprintf. * scripts/@ftp/display.m: replaced printf by fprintf. * scripts/general/inputParser.m: replaced printf by fprintf. * scripts/general/methods.m: replaced printf by fprintf. * scripts/general/profexplore.m: replaced printf by fprintf. * scripts/general/profshow.m: replaced printf by fprintf. * scripts/help/help.m: replaced puts by fputs and printf by fprintf. * scripts/help/lookfor.m: replaced puts by fputs and printf by fprintf. * scripts/help/which.m: replaced printf by fprintf. * scripts/image/imformats.m: replaced printf by fprintf. * scripts/io/beep.m: replaced puts by fputs. * scripts/io/textread.m: replaced printf by fprintf. * scripts/java/javaclasspath.m: replaced printf by fprintf. * scripts/java/javamem.m: replaced printf by fprintf. * scripts/miscellaneous/dir.m: replaced printf by fprintf. * scripts/miscellaneous/dos.m: replaced printf by fprintf. * scripts/miscellaneous/fact.m: replaced printf by fprintf. * scripts/miscellaneous/info.m: replaced printf by fprintf. * scripts/miscellaneous/license.m: replaced printf by fprintf. * scripts/miscellaneous/ls.m: replaced puts by fputs. * scripts/miscellaneous/menu.m: replaced printf by fprintf. * scripts/miscellaneous/mkoctfile.m: replaced printf by fprintf. * scripts/miscellaneous/private/display_info_file.m: * scripts/miscellaneous/unix.m: replaced printf by fprintf. * scripts/miscellaneous/ver.m: replaced printf by fprintf. * scripts/miscellaneous/what.m: replaced printf by fprintf. * scripts/ode/ode23.m: replaced printf by fprintf. * scripts/ode/ode45.m: replaced printf by fprintf. * scripts/optimization/fminbnd.m: replaced printf by fprintf. * scripts/optimization/optimset.m: replaced puts by fputs and printf by fprintf. * scripts/optimization/sqp.m: replaced printf by fprintf. * scripts/pkg/pkg.m: replaced printf by fprintf. * scripts/pkg/private/describe.m: replaced printf by fprintf. * scripts/pkg/private/install.m: replaced printf by fprintf. * scripts/pkg/private/installed_packages.m: replaced printf by fprintf. * scripts/pkg/private/list_forge_packages.m: replaced puts by fputs and printf by fprintf. * scripts/pkg/private/rebuild.m: replaced printf by fprintf. * scripts/plot/util/__gnuplot_drawnow__.m: replaced puts by fputs and printf by fprintf. * scripts/signal/stft.m: replaced printf by fprintf. * scripts/sparse/bicg.m: replaced printf by fprintf. * scripts/sparse/bicgstab.m: replaced printf by fprintf. * scripts/sparse/cgs.m: replaced printf by fprintf. * scripts/sparse/pcg.m: replaced printf by fprintf. * scripts/sparse/pcr.m: replaced printf by fprintf. * scripts/sparse/qmr.m: replaced printf by fprintf. * scripts/statistics/models/logistic_regression.m: replaced printf by fprintf. * scripts/statistics/tests/anova.m: replaced printf by fprintf. * scripts/statistics/tests/bartlett_test.m: replaced printf by fprintf. * scripts/statistics/tests/chisquare_test_homogeneity.m: replaced printf by fprintf. * scripts/statistics/tests/chisquare_test_independence.m: replaced printf by fprintf. * scripts/statistics/tests/cor_test.m: replaced printf by fprintf. * scripts/statistics/tests/f_test_regression.m: replaced printf by fprintf. * scripts/statistics/tests/hotelling_test.m: replaced printf by fprintf. * scripts/statistics/tests/hotelling_test_2.m: replaced printf by fprintf. * scripts/statistics/tests/kolmogorov_smirnov_test.m: replaced printf by fprintf. * scripts/statistics/tests/kolmogorov_smirnov_test_2.m: replaced printf by fprintf. * scripts/statistics/tests/kruskal_wallis_test.m: replaced printf by fprintf. * scripts/statistics/tests/manova.m: replaced printf by fprintf. * scripts/statistics/tests/mcnemar_test.m: replaced printf by fprintf. * scripts/statistics/tests/prop_test_2.m: replaced printf by fprintf. * scripts/statistics/tests/run_test.m: replaced printf by fprintf. * scripts/statistics/tests/sign_test.m: replaced printf by fprintf. * scripts/statistics/tests/t_test.m: replaced printf by fprintf. * scripts/statistics/tests/t_test_2.m: replaced printf by fprintf. * scripts/statistics/tests/t_test_regression.m: replaced printf by fprintf. * scripts/statistics/tests/u_test.m: replaced printf by fprintf. * scripts/statistics/tests/var_test.m: replaced printf by fprintf. * scripts/statistics/tests/welch_test.m: replaced printf by fprintf. * scripts/statistics/tests/wilcoxon_test.m: replaced printf by fprintf. * scripts/statistics/tests/z_test.m: replaced printf by fprintf. * scripts/statistics/tests/z_test_2.m: replaced printf by fprintf. * scripts/strings/strtok.m: replaced printf by fprintf. * scripts/testfun/__run_test_suite__.m: replaced puts by fputs and printf by fprintf. * scripts/testfun/demo.m: replaced printf by fprintf. * scripts/testfun/example.m: replaced printf by fprintf. * scripts/testfun/private/compare_plot_demos.m: replaced printf by fprintf. * scripts/testfun/rundemos.m: replaced printf by fprintf. * scripts/testfun/runtests.m: replaced puts by fputs and printf by fprintf. * scripts/testfun/speed.m: replaced printf by fprintf. * scripts/testfun/test.m: replaced printf by fprintf. * scripts/time/calendar.m: replaced puts by fputs and printf by fprintf. * test/io.tst: replaced printf by fprintf.

--- a/libinterp/corefcn/file-io.cc	Wed Apr 20 09:19:06 2016 +0200
+++ b/libinterp/corefcn/file-io.cc	Wed Apr 20 17:53:10 2016 +0200
@@ -780,7 +780,7 @@
 Implementation Note: For compatibility with @sc{matlab}, escape sequences in\n\
 the template string (e.g., @qcode{\"@xbackslashchar{}n\"} => newline) are\n\
 expanded even when the template string is defined with single quotes.\n\
-@seealso{fputs, fdisp, fwrite, fscanf, printf, sprintf, fopen}\n\
+@seealso{fputs, fdisp, fwrite, fscanf, sprintf, fopen}\n\
 @end deftypefn")
 {
   static std::string who = "fprintf";
@@ -824,99 +824,6 @@
     return ovl ();
 }
 
-DEFUN (printf, args, nargout,
-       "-*- texinfo -*-\n\
-@deftypefn {} {} printf (@var{template}, @dots{})\n\
-Print optional arguments under the control of the template string\n\
-@var{template} to the stream @code{stdout} and return the number of\n\
-characters printed.\n\
-@ifclear OCTAVE_MANUAL\n\
-\n\
-See the Formatted Output section of the GNU Octave manual for a\n\
-complete description of the syntax of the template string.\n\
-@end ifclear\n\
-\n\
-Implementation Note: For compatibility with @sc{matlab}, escape sequences in\n\
-the template string (e.g., @qcode{\"@xbackslashchar{}n\"} => newline) are\n\
-expanded even when the template string is defined with single quotes.\n\
-@seealso{fprintf, sprintf, scanf}\n\
-@end deftypefn")
-{
-  static std::string who = "printf";
-
-  int nargin = args.length ();
-
-  if (nargin == 0)
-    print_usage ();
-
-  int result;
-
-  if (! args(0).is_string ())
-    error ("%s: format TEMPLATE must be a string", who.c_str ());
-
-  octave_value_list tmp_args;
-
-  if (nargin > 1)
-    {
-      tmp_args.resize (nargin-1, octave_value ());
-
-      for (int i = 1; i < nargin; i++)
-        tmp_args(i-1) = args(i);
-    }
-
-  result = stdout_stream.printf (args(0), tmp_args, who);
-
-  if (nargout > 0)
-    return ovl (result);
-  else
-    return ovl ();
-}
-
-DEFUN (fputs, args, ,
-       "-*- texinfo -*-\n\
-@deftypefn  {} {} fputs (@var{fid}, @var{string})\n\
-@deftypefnx {} {@var{status} =} fputs (@var{fid}, @var{string})\n\
-Write the string @var{string} to the file with file descriptor @var{fid}.\n\
-\n\
-The string is written to the file with no additional formatting.  Use\n\
-@code{fdisp} instead to automatically append a newline character appropriate\n\
-for the local machine.\n\
-\n\
-Return a non-negative number on success or EOF on error.\n\
-@seealso{fdisp, fprintf, fwrite, fopen}\n\
-@end deftypefn")
-{
-  static std::string who = "fputs";
-
-  if (args.length () != 2)
-    print_usage ();
-
-  octave_stream os = octave_stream_list::lookup (args(0), who);
-
-  return ovl (os.puts (args(1), who));
-}
-
-DEFUN (puts, args, ,
-       "-*- texinfo -*-\n\
-@deftypefn  {} {} puts (@var{string})\n\
-@deftypefnx {} {@var{status} =} puts (@var{string})\n\
-Write a string to the standard output with no formatting.\n\
-\n\
-The string is written verbatim to the standard output.  Use @code{disp} to\n\
-automatically append a newline character appropriate for the local machine.\n\
-\n\
-Return a non-negative number on success and EOF on error.\n\
-@seealso{fputs, disp}\n\
-@end deftypefn")
-{
-  static std::string who = "puts";
-
-  if (args.length () != 1)
-    print_usage ();
-
-  return ovl (stdout_stream.puts (args(0), who));
-}
-
 DEFUN (sprintf, args, ,
        "-*- texinfo -*-\n\
 @deftypefn {} {} sprintf (@var{template}, @dots{})\n\
@@ -930,7 +837,7 @@
 Implementation Note: For compatibility with @sc{matlab}, escape sequences in\n\
 the template string (e.g., @qcode{\"@xbackslashchar{}n\"} => newline) are\n\
 expanded even when the template string is defined with single quotes.\n\
-@seealso{printf, fprintf, sscanf}\n\
+@seealso{fprintf, sscanf}\n\
 @end deftypefn")
 {
   static std::string who = "sprintf";
@@ -1027,7 +934,7 @@
 See the Formatted Input section of the GNU Octave manual for a\n\
 complete description of the syntax of the template string.\n\
 @end ifclear\n\
-@seealso{fgets, fgetl, fread, scanf, sscanf, fopen}\n\
+@seealso{fgets, fgetl, fread, sscanf, fopen}\n\
 @end deftypefn")
 {
   static std::string who = "fscanf";
@@ -1090,7 +997,7 @@
 Reaching the end of the string is treated as an end-of-file condition.  In\n\
 addition to the values returned by @code{fscanf}, the index of the next\n\
 character to be read is returned in @var{pos}.\n\
-@seealso{fscanf, scanf, sprintf}\n\
+@seealso{fscanf, sprintf}\n\
 @end deftypefn")
 {
   static std::string who = "sscanf";
@@ -1138,27 +1045,6 @@
   return retval;
 }
 
-DEFUN (scanf, args, nargout,
-       "-*- texinfo -*-\n\
-@deftypefn  {} {[@var{val}, @var{count}, @var{errmsg}] =} scanf (@var{template}, @var{size})\n\
-@deftypefnx {} {[@var{v1}, @var{v2}, @dots{}, @var{count}, @var{errmsg}]] =} scanf (@var{template}, \"C\")\n\
-This is equivalent to calling @code{fscanf} with @var{fid} = @code{stdin}.\n\
-\n\
-It is currently not useful to call @code{scanf} in interactive programs.\n\
-@seealso{fscanf, sscanf, printf}\n\
-@end deftypefn")
-{
-  int nargin = args.length ();
-
-  octave_value_list tmp_args (nargin+1, octave_value ());
-
-  tmp_args (0) = 0.0;
-  for (int i = 0; i < nargin; i++)
-    tmp_args(i+1) = args(i);
-
-  return Ffscanf (tmp_args, nargout);
-}
-
 static octave_value_list
 textscan_internal (const std::string& who, const octave_value_list& args)
 {