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/doc/interpreter/func.txi	Wed Apr 20 09:19:06 2016 +0200
+++ b/doc/interpreter/func.txi	Wed Apr 20 17:53:10 2016 +0200
@@ -108,12 +108,12 @@
 @example
 @group
 function wakeup
-  printf ("\a");
+  fprintf ("\a");
 endfunction
 @end group
 @end example
 
-The @code{printf} statement (@pxref{Input and Output}) simply tells
+The @code{fprintf} statement (@pxref{Input and Output}) simply tells
 Octave to print the string @qcode{"@xbackslashchar{}a"}.  The special character
 @samp{\a} stands for the alert character (ASCII 7).  @xref{Strings}.
 
@@ -143,7 +143,7 @@
 @example
 @group
 function wakeup (message)
-  printf ("\a%s\n", message);
+  fprintf ("\a%s\n", message);
 endfunction
 @end group
 @end example
@@ -157,7 +157,7 @@
 @noindent
 will cause Octave to ring your terminal's bell and print the message
 @samp{Rise and shine!}, followed by a newline character (the @samp{\n}
-in the first argument to the @code{printf} statement).
+in the first argument to the @code{fprintf} statement).
 
 In most cases, you will also want to get some information back from the
 functions you define.  Here is the syntax for writing a function that
@@ -488,7 +488,7 @@
 @group
 function print_arguments (varargin)
   for i = 1:length (varargin)
-    printf ("Input argument %d: ", i);
+    fprintf ("Input argument %d: ", i);
     disp (varargin@{i@});
   endfor
 endfunction
@@ -620,7 +620,7 @@
       return;
     endif
   endfor
-  printf ("no nonzero elements found\n");
+  fprintf ("no nonzero elements found\n");
 endfunction
 @end group
 @end example
@@ -664,7 +664,7 @@
 @example
 @group
 function hello (who = "World")
-  printf ("Hello, %s!\n", who);
+  fprintf ("Hello, %s!\n", who);
 endfunction
 @end group
 @end example
@@ -825,15 +825,15 @@
 @example
 @group
 function f ()
-  printf ("in f, calling g\n");
+  fprintf ("in f, calling g\n");
   g ()
 endfunction
 function g ()
-  printf ("in g, calling h\n");
+  fprintf ("in g, calling h\n");
   h ()
 endfunction
 function h ()
-  printf ("in h\n")
+  fprintf ("in h\n")
 endfunction
 @end group
 @end example
@@ -1096,8 +1096,8 @@
 function count_calls ()
   mlock ();
   persistent calls = 0;
-  printf ("'count_calls' has been called %d times\n",
-          ++calls);
+  fprintf ("'count_calls' has been called %d times\n",
+           ++calls);
 endfunction
 
 count_calls ();