Programming :: Difference Between Two Arithmetic Pointers
Jun 1, 2010What is the difference between *ptr++ and (*ptr)++. In my opinion the terminology is all over the place so if you could give an example it would be better.
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Programming :: Arithmetic In Shell Scripts?
Nov 19, 2010Is it possible to do arithmetic in shell scripts? If so, just how is it done?Here is the code so far:
Code:
#!/bin/bash
time=$(date +%H%M)
[code]...
Programming :: Bash Shell Script Arithmetic??
Nov 10, 2010I have four files that contain numbers that I grep for in a variable#!/bin/bashcat FILENAME`date +%y%m%d*.tot` | grep Grand | awk '{print $4}'
#output is
12
67
[code]...
Programming :: Bash - Syntax For ((<arithmetic Expression>)) Usage ?
Mar 18, 2010I do not understand bash' syntax regarding the use of ((<arithmetic expression>)). $((<arithmetic expression>)) is tokenised to a single word. OK.
Code:
In isolation
Code:
It may not be used where a word is expected. This generates a syntax error. Why?
Code:
Programming :: Arrays In The C Programming Language Are Pointers To The First Element Of The Array?
Mar 27, 2010I wonder why arrays in the C programming language are pointers to the first element of the array, not the first element of the array itself?
View 14 Replies View RelatedProgramming :: C With Gcc: Are All Variables Defined Like Pointers
Sep 13, 2010i'm practicing in very basic c programs using the gcc compiler.I found that when i create two variables let's say
Code:
int a,b and Code: a=15;
b=3;
a=b;
b--;
then a equals 2.I thought that this isn't normal in C isn't it?I haven't had the time to read the gcc documentation yet...so i think it has something to do with my compiler's default settings.I use the
Code: gcc filename.c -o filename command to compile
Are all variables defined like pointers?
Programming :: C - Segfault During Malloc. How To Use The Pointers
Mar 23, 2010So the place where I'm having a problem is here:
Code:
typedef struct {
void **Mem_Chunk;
[code]...
Programming :: Function Pointers To Class Members Cpp
May 23, 2010i'm a bit stuck playing with the following class setup for glut. The actual issue is with the function pointers.Basically the following code is the opengl redbook cube example slightly modified.
View 2 Replies View RelatedProgramming :: Function Pointers With Variable Arguments
Jul 14, 2011I need to call functions that match an input string (if input str = "func1", call func1), so I have this:
Code:
#include <stdio.h>
#include <string.h>
void function_a(void) { printf("Function A
"); }
[Code].....
In the above example, the functions take no input arguments. Can they take a different number of arguments, for example, function_a(int), function_c(int, int), function_e(int, char, int)? How can I do that?
Programming :: Passing Local Variable Pointers In ASM
Apr 12, 2010I want to know is there some more efficient way of passing a pointer to a local variable as a parameter to a function in x86 asm? Right now I have to move the base pointer to a temp register, subtract from the register and pass that, like this (assuming a local var at esp-4):
Code:
mov eax, ebp
sub eax, 4
push eax
Is there a better way?
Programming :: Perl - Pointers To Arrays From Hashes?
Feb 18, 2010I'm trying to figure out how to code for this specific type of instance - I want to use a hash and have the key be a reference to an array, and not use the key in the standard way of it being a scalar. Basically, I have a large output that I need to process line by line, and rather have access to it as an array than a big block in a scalar. For the big block hash as a scalar I would do -
Code:
foreach $CONTROLLER (<CONTROLLER_LIST>) {
$ALL_DISKS{$CONTROLLER} = `ssh -n <commands>`;
}
Now I know I could take the scalar and split it to another array after the fact like -
Code:
@TEMP_HOLD = split (/s+/,$ALL_DISKS{$CONTROLLER});
How would I code it that I would have access to the key information as an array and not a scalar? I know it needs to be a pointer and we're going to have -> in there somewhere, but not sure how to approach it. Some of the documentaiton I've been reading about referencing I've found a little confusing so far, and trying to figure out how to use them in context of what I'm working on.
Programming :: Is Spacing As Used Non-factor When Declaring Pointers?
Jul 3, 2010I've seen all three uses:
type * pointer
type *pointer
type* pointer
Are these 3 forms essentially the same, i.e., is the spacing as used here a non-factor when declaring pointers?
Programming :: How To Pull Node Pointers Out Of The Model
Mar 25, 2010I am trying to find a way to pull Node Pointers out of the model, for use in other areas of the program. The solution is probably simple but I haven't had any luck finding it.
Model for a QTreeView:
Code:
class testModel : public QAbstractItemModel
{
public:
testModel();
~testModel();
[code]....
Programming :: Two Pointers, That Have The Same Address Point To Different Values?
Feb 17, 2011I have the most strange problem ever in programming. I fork a process into a parent and a child. In every forked process i declare a pointer, malloc and define a different value for every pointer.When i printf the value and the address guess what? They both have the SAME ADDRESS but DIFFERENT values, as assigned..Here's the portion of my code:
pid = fork ();
switch (pid)
{
[code]....
Programming :: Sizeof Struct With Function Pointers As A Member?
Jul 2, 2010I following structure
typedef struct
{
[code]...
Programming :: Double Pointers / Matrix GCC (fill It One Column With Zeros And The Other With Ones)
May 26, 2011I have a 10x2 matrix, I create said matrix and fill it one column with zeros and the other with ones, now when I print the matrix I get this:
column 1:
0,0,0,0,0,0,0,0,1,1
column 2:
1,1,1,1,1,1,1,1,1,1
The first two rows of the second column are being replaced into the last two rows of the first column, now I even checked in visual studio and it works fine there. A friend tried my code and he gets it even worse:
column 1:
0,0,0,0,1,1,1,1,1,1
column 2:
1,1,1,1,1,1,1,1,1,1
As far as I've seen it must be a problem with GCC, unfortunately I need to have this up and running in GCC no matter what.
[Code].....
Programming :: Invoke The Calculator "bc" In Bash Script For Floating Point Arithmetic?
May 15, 2010My main problem right now is doing floating point arithmetic within a bash script, with variables.Right now I have a folder called "myExamples" with a script called "run_example" that runs with no issues.I plan to(1) create many folders inside [myExamples], that are named [example10] [example11]...each containing an identical copy of (run_example),(2) modify Line 172 of each copy of (run_example)...in one copy, it would be 3.00, the next copy would have 3.05, etc. (This part doesn't work!)How can use the available calculator bc code to do floating point operations?My code is below -
#!/bin/sh
# run from directory where this script is
cd `echo $0 | sed 's/(.*)/.*/1/'` # extract pathname
[code]...
Programming :: 3D Programming - Difference Between JOGL And C++ OpenGL Programming?
Aug 27, 2010I am interested in learning 3D programming. The thing is, I would hate to put too much effort to learn something that doesn't have future and is dying. My favorite language at the time is Java. My goal is professional programming.
So I have several questions:
1. Should I learn JOGL or start learning C++ and do C++ openGL programming?
2. Is there a big difference between JOGL and C++ openGL programming?
3. Is it worth to learn openGL? Does it have a future?
4. Is it a big difference between openGL and directX coding?
5. If choosing Java, then JOGL or LWJGL?
Why and what is the main difference between them?
General :: Arithmetic Operation In Bash?
Mar 10, 2011I've the following input file (sorted.txt)
Code:
A 1
A 1
[code]...
Programming :: Difference Between Two Packages Of JDK
May 3, 2010Ubuntu 10.04 lucid. sun-java6-jdk has been dropped from the Multiverse section of the Ubuntu archive. They recommend using openjdk-6 instead. Is there any difference between these 2 packages?
View 3 Replies View RelatedProgramming :: Difference Between /bin/bash And /bin/sh?
Dec 27, 2008I know it's a very silly question but could someone please explain the difference between "/bin/bash" & "/bin/sh" I was under the impression that both are same but following output on my Ubuntu 8.10 is making me raise my eyebrows.
Quote:
parag@station3:~$ ls -l /bin/bash ; ls -l /bin/sh
-rwxr-xr-x 1 root root 725136 2008-05-13 00:18 /bin/bash
lrwxrwxrwx 1 root root 4 2008-12-03 21:42 /bin/sh -> dash
parag@station3:~$
Programming :: Difference In SSH And Solaris?
Nov 1, 2010I would like know know difference in ssh comman in solaris and linux, are they both same?
View 2 Replies View RelatedUbuntu :: Invalid Arithmetic Operator - Trying To Take Away Two Numbers With Decimals
Feb 7, 2011I'm trying to make a bash script that takes away two decimal numbers. This is to work out partitioning information.
Code:
hddsize=`sudo parted -s /dev/sda unit GB print | grep "Disk" | tr -d [A-Z][a-z] | tr -d '/: '`
trimsize="1.5"
partitionendsize=$(($hddsize - $trimsize))
I get an invalid arithmetic operator. Not sure how to minus these two numbers. Is it a floating point issue?
Programming :: Defining Functions - What Is The Difference?
Aug 12, 2010But what is the difference between this...
Code:
my_fucnction () {
echo "Hello World"
}
Code:
function my_fucnction {
[Code]...
Programming :: Difference Between Hexdump And Objdump?
Aug 15, 2010I am not clear with difference between hexdump and objdump and coredump. I wrote a small program
Code:
main (){
int a=2;
int b=4;
int k=b/a;
int m=9;
[Code].....
Some of the above instructions such as 89 d0 should be present in hexdump. What exactly is the hexdump ,objdump and coredump and what is their importance?
Programming :: Difference Between Struct And Union?
Nov 6, 2010I have been spending time (starting yesterday) reverse-engineering GTK+ to get my programming skills up. I came across a struct in the headers (_GtkArg, which was then typedeffed into GtkArg) that includes a union in it that has pretty much the same properties as a struct. Then, there was a struct inside the union.
I'm confused. Just what is the difference between a union and a struct?
P.S. I am using GTK's native C programming language.
Programming :: Difference Between Setup_irq And Request_irq?
Feb 1, 2011difference between setup_irq and request_irq and if there is a difference is there a way to use request_irq instead of setup_irq in this module?
[URL]
Programming :: Difference Between Various Symbols Of Kernel
Aug 22, 2010I was going through some exercise given in my school. I have read the C book but I am not able to understand some part. That is static variable. What exactly is a static variable and what does it do? I saw in Linux Kernel Programming external and exported are also some thing. I am not getting the difference between static,EXPORT_SYMBOL,external variable types. If I make a kernel module then how will I make sure that my variable is visible to the kernel. Is this what it is all talking about? I have checked this page [URL].
View 2 Replies View RelatedProgramming :: Difference Between PHP Echo() And Print()?
Dec 1, 2010What's the difference between PHP echo() and PHP print(), especially in the execution time?
View 6 Replies View RelatedProgramming :: Difference Between Two Find Commands?
Dec 27, 2009Code:
find . -name *.txt
Code:
find . -name *.txt