1) They probably differ in being constants or non-constants.
3) It's "3d" because you have an extra pointer in the way. Every level of pointers requires another dereferencing operation to access it. One level pointer requires one. Two level pointer requires two. Three level pointer requires three. 97 level pointer requires 97. That is the pattern.
The first dereferencing operation gets rid of is x itself; once you do so, you are essentially accessing y. The next level of pointers points to individual rows inside y. The last level gets you an individual cell in that row.
The diagram is x -> y -> row -> column.
These 2 Users Gave Thanks to Corona688 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)
This code is to print out the program name and arguments list one by one:
1 #include<stdio.h>
2
3 void main(int argc, char *argv)
4 {
5 int iCount = 0;
6 while (iCount < argc) {
7 printf("argc:%d\t%s\n",iCount, argv);
8 ... (14 Replies)
Hello,
The purpose of the program is to print a sub string from the prompt inputs. I do not understand why char pointer does not work but char array will for line 40 and Line 41.
./a.out thisisatest 0 8
substring = "thisisat"And my code is:
#include <stdio.h>
#include <stdlib.h>
#include... (29 Replies)
how to copy content of character pointer to character array in c programming..
char *num;
char name=num; (1 Reply)
Discussion started by: zinat
1 Replies
LEARN ABOUT DEBIAN
tk::tablematrix::spreadsheethiderows
TableMatrix::SpreadsheetHideRows(3pm) perl/Tk Documentation TableMatrix::SpreadsheetHideRows(3pm)NAME
Tk::TableMatrix::SpreadsheetHideRows - Table Display with selectable hide/un-hide of rows
SYNOPSIS
use Tk;
use Tk::TableMatrix::SpreadsheetHideRows
my $t = $top->Scrolled('SpreadsheetHideRows',
-selectorCol => 3,
-expandData => $hashRef,
-rows => 21, -cols => 11,
-width => 6, -height => 6,
-titlerows => 1, -titlecols => 1,
-variable => $arrayVar,
-selectmode => 'extended',
-resizeborders => 'both',
-titlerows => 1,
-titlecols => 1,
-bg => 'white',
);
DESCRIPTION
Tk::TableMatrix::SpreadsheetHideRows is a Tk::TableMatrix::Spreadsheet-derived widget that implements a Spreadsheet-like display of tabular
information, where some of the rows in the table can be expanded/hidden by clicking a '+/-' selector in the row. This can be used to
display top-level information in a table, while allowing the user to expand certain table rows to view detail-level information.
See demos/SpreadsheetHideRows in the source distribution for a simple example of this widget
Widget-specific Options
In addition the standard Tk::TableMatrix widget options. The following options are implemented:
-selectorCol
Column number where the +/- selector will appear. Clicking on the +/- selector will expand/hide the detail information in the table for a
particular row.
-selectorColWidth
Width of the column used to display the +/- selector. Defaults to 2
-expandData
Hash ref defining the detail-level data displayed when a row is expanded (by clicking the +/- selector). This hash ref should have the
following structure:
$expandData = {
row1 => { tag => 'detailDataTag',
data => $detailData,
spans=> $spanData,
expandData => $subLevelData
},
row2 => {
.
.
}
Where:
row1, row2, ... Row numbers that will be expandable.
tag => 'detailDataTag' Tag name that will be applied to the detail data.
(optional)
$detailData 2D Array of detail-data to be displayed when
the row is expanded.
e.g. [ [ r1c1, r1c2, r1c3 ],
[ r2c1, r2c2, r2,c3] ]
$spans 1D array of span information (optional) to be
used for display of the detail information.
e.g. [ col2 => "rows,cols", col4 => "rows,cols", ... ]
$subLevelData Optional Recursive expandData used to hold detail-data of detail-data.
MEMBER DATA
The following items are stored as member data
defaultCursor
Name of the mouse cursor pointer that is used for normal (i.e. non-title, non-indicator) cells in the widget. This is set to the value of
the $widget->cget(-cursor) option when the widget is created.
indRowCols
Hash ref of Row/Cols indexes where there are indicators stores. This is a quick lookup hash built from _expandData.
_expandData
Internal version of the expandData hash. Any sub-detail data (i.e. expand data that is at lower levels of expandData) that is visible is
placed at the top level of this hash, for keeping track of the visible expandData.
Widget Methods
In addition the standard Tk::TableMatrix widget method. The following methods are implemented:
showDetail
Shows (i.e. expands the table) the detail data for a given row. This method is called when a user clicks on an indicator that is not
already expanded.
Usage:
$widget->showDetail($row);
# Shows the detail data for row number $row
hideDetail
Hides the detail data for a given row. This method is called when a user clicks on an indicator that is already expanded.
Usage:
$widget->hideDetail($row);
# Hides the detail data for row number $row
Tk1.23 2007-01-09 TableMatrix::SpreadsheetHideRows(3pm)