because the sizeof(a) in:
is the size of the pointer; not the number of bytes allocated by malloc() to the array pointed to by a.
And, since you're getting 8 bytes for sizeof(a), we know that you are building your application as a 64-bit app; not as a 32-bit app. You don't want sizeof(a) when a is a pointer; you need to use the number of bytes allocated to the space pointed to by that pointer instead.
This User Gave Thanks to Don Cragun For This Post:
void main()
{
int a={1,2,3,4,5,6,7,8,9,10};
int *p=a;
int *q=&a;
cout<<q-p+1<<endl;
}
The output is 10, how?
if we give cout<<q it will print the address, value won't print....
if we give cout<<p it will print the address, value won't print....
p has the base addr; q... (1 Reply)
All ..
I am having a pointer array . And trying to store the addess into that pointer array . please see below the problem i faced
code:
int cnt1;
char *t_array;
char *f_array;
for(cnt1=0; cnt1<1000; cnt1++)
{
t_array =... (1 Reply)
If one wants to get a start address of a array or a string or a block of memory via a function, there are at least two methods to achieve it:
(1) one is to pass a pointer-to-pointer parameter, like:
int my_malloc(int size, char **pmem)
{
*pmem=(char *)malloc(size);
if(*pmem==NULL)... (11 Replies)
Hi all,
Can anyone provide help with getting the right syntax regarding array/pointers in C in the following code? Can't locate a specific example which clarifies this...
Say I declare a typedef to an array of pointers to some type...
/**
* An array of ptrs to sections
*/
typedef... (4 Replies)
if i create an array of pointers to a structure "struct node" as:
struct node *r;
and create "n" number of "linked lists" and assign it to the various struct pointers r using some function with a return type as structure pointer as:
r=multiplty(.......) /*some parameters*/
is... (2 Replies)
Hi guys,
Besides the points bellow, what would best practices for scripting be ?
1) set the PATH
2) unset the current environment (set -u ?)
3) (re)set the IFS to default value - space (IFS="" <- is this correct ?)
4) check the return code for each action inside the script (cd, rsync,... (1 Reply)
I am struggling with the pointer to 2D-array (cf: 2D array of pointers). Can anybody help me elaborate how the pointer x moves in the memory to access the individual of y, especially the high lighted lines?
I have talked to one of the curators of the forum, but I am still not quite clear.
Here... (1 Reply)
Discussion started by: yifangt
1 Replies
LEARN ABOUT DEBIAN
gtk2::pagesetup
Gtk2::PageSetup(3pm) User Contributed Perl Documentation Gtk2::PageSetup(3pm)NAME
Gtk2::PageSetup - wrapper for GtkPageSetup
HIERARCHY
Glib::Object
+----Gtk2::PageSetup
METHODS
pagesetup = Gtk2::PageSetup->new
pagesetup = Gtk2::PageSetup->new_from_file ($file_name)
o $file_name (localized file name)
May croak with a Glib::Error in $@ on failure.
Since: gtk+ 2.12
pagesetup = Gtk2::PageSetup->new_from_key_file ($key_file, $group_name)
o $key_file (Glib::KeyFile)
o $group_name (string or undef)
May croak with a Glib::Error in $@ on failure.
Since: gtk+ 2.12
double = $setup->get_bottom_margin ($unit)
o $unit (Gtk2::Unit)
$setup->set_bottom_margin ($margin, $unit)
o $margin (double)
o $unit (Gtk2::Unit)
double = $setup->get_left_margin ($unit)
o $unit (Gtk2::Unit)
$setup->set_left_margin ($margin, $unit)
o $margin (double)
o $unit (Gtk2::Unit)
$setup->load_file ($file_name)
o $file_name (string)
May croak with a Glib::Error in $@ on failure.
Since: gtk+ 2.14
$setup->load_key_file ($key_file, $group_name)
o $key_file (Glib::KeyFile)
o $group_name (string or undef)
May croak with a Glib::Error in $@ on failure.
Since: gtk+ 2.14
pageorientation = $setup->get_orientation
$setup->set_orientation ($orientation)
o $orientation (Gtk2::PageOrientation)
double = $setup->get_page_height ($unit)
o $unit (Gtk2::Unit)
double = $setup->get_page_width ($unit)
o $unit (Gtk2::Unit)
double = $setup->get_paper_height ($unit)
o $unit (Gtk2::Unit)
$setup->set_paper_size_and_default_margins ($size)
o $size (Gtk2::PaperSize)
papersize = $setup->get_paper_size
$setup->set_paper_size ($size)
o $size (Gtk2::PaperSize)
double = $setup->get_paper_width ($unit)
o $unit (Gtk2::Unit)
double = $setup->get_right_margin ($unit)
o $unit (Gtk2::Unit)
$setup->set_right_margin ($margin, $unit)
o $margin (double)
o $unit (Gtk2::Unit)
$setup->to_file ($file_name)
o $file_name (localized file name)
May croak with a Glib::Error in $@ on failure.
Since: gtk+ 2.12
$setup->to_key_file ($key_file, $group_name)
o $key_file (Glib::KeyFile)
o $group_name (string or undef)
Since: gtk+ 2.12
double = $setup->get_top_margin ($unit)
o $unit (Gtk2::Unit)
$setup->set_top_margin ($margin, $unit)
o $margin (double)
o $unit (Gtk2::Unit)
ENUMS AND FLAGS
enum Gtk2::PageOrientation
o 'portrait' / 'GTK_PAGE_ORIENTATION_PORTRAIT'
o 'landscape' / 'GTK_PAGE_ORIENTATION_LANDSCAPE'
o 'reverse-portrait' / 'GTK_PAGE_ORIENTATION_REVERSE_PORTRAIT'
o 'reverse-landscape' / 'GTK_PAGE_ORIENTATION_REVERSE_LANDSCAPE'
enum Gtk2::Unit
o 'pixel' / 'GTK_UNIT_PIXEL'
o 'points' / 'GTK_UNIT_POINTS'
o 'inch' / 'GTK_UNIT_INCH'
o 'mm' / 'GTK_UNIT_MM'
SEE ALSO
Gtk2, Glib::Object
COPYRIGHT
Copyright (C) 2003-2011 by the gtk2-perl team.
This software is licensed under the LGPL. See Gtk2 for a full notice.
perl v5.14.2 2012-05-27 Gtk2::PageSetup(3pm)