C

Great Reads

by Martin Mitáš

How to support scrolling within your controls.

Synchronization with Visual C++ and the Windows API

by Espen Harlinn

Choosing the right synchronization mechanisms when working with threads, thread-pools, and I/O Completion ports to create high performance asynchronous servers in C++

Intermediate Data Clustering with k-means

by Andy Allinger

Add features to k-means for missing data, mixed data, and choosing the number of clusters

Authenticated Encryption

by Jeffrey Walton

Perform authenticated encryption with Crypto++.

Latest Articles

BASIC is not dead! Neither is the WIN32! Time to end the myth. (Part 3)

by Chris Boss

BASIC: A powerful language often underestimated and undervalued

RGFW | Singler-Header Lightweight Framework for Basic Window and Graphics Context Handling (like GLFW)

by ColleagueRiley

A multi-platform single-header very simple-to-use framework library for creating GUI Libraries or simple GUI programs.

How to Design an AXI4 Stream Interface in Vitis HLS

by FPGANinja

A walkthrough and source code for designing a stream interface in Vitis HLS

Fast SSE Pseudo Random Number Generator

by Alexey Shtykov

The thing that could generate pseudo random numbers faster than standard library does

All Articles

top

C

"dereferencing pointer to incomplete type" error. Any advice?

13 Mar 2015 by Member 11524225

#include #include #include #define M 100#define FLUSH while(getchar() != '\n')typedef struct node *nd;typedef struct { char bkNumber[5]; char bkTitle[M]; char bkAuthor[M]; int bkCopyright; ...

"dereferencing pointer to incomplete type" error. Any advice?

15 Mar 2015 by Frankie-C

All your code refers to a variable type nd defined as:typedef struct node *nd;In this case nd defines a pointer to an 'incomplete' node structure.The structure 'node' is defined nowhere, so when you want access fields of the structure the compiler doesn't know how to get them (the...

"Error during WebSocket Handshake: Sec-WebSocket-Accept Mismatch"

21 Feb 2013 by kavinsp

Hi , i am writing a web socket server implementation in c++, but i am getting this error "Error during WebSocket Handshake: Sec-WebSocket-Accept Mismatch" in console.Do you have any idea of what goes wrong for getting this error??RegardsKavin

C++

"If else" conditionals not working as expected

14 Jan 2016 by Dishank Bansal

#includeint main(){float x = 9.81 ; if( x == 9.81){printf("the value of x is 9.81\n");}else {printf("No its not 9.81 \n");}}In this we expect "if" statement to execute but instead "else" statement get executed.Why is it so??

"If else" conditionals not working as expected

14 Jan 2016 by KarstenK

it is common issue that float arent exactly what they seem. ;-)The reason is there internal representation in the memory. Make an output of it.The solution is to calculate the difference an accept a small one. Remember that it maybe signed.float x = 9.81f; float d = x -...

"If else" conditionals not working as expected

14 Jan 2016 by CPallini

KarstenK already gave you the solution. I suggest you to read: "What Every Computer Scientist Should Know About Floating-Point Arithmetic"[^].

"If else" conditionals not working as expected

14 Jan 2016 by Sergey Alexandrovich Kryukov

Just my 5 cents in addition to other answers:It's not a good idea to use the operator == with floating-point operands. That's right, I don't know the situations where it can be useful at all. Even with floating-point values representing numbers with zero fractional part, you should not use...

"if statement" have multiple parallel conditions,Which style is more efficient I wrote?

21 Jan 2013 by zqliu

f1(), f2(), f3() is a function of type bool, which of the following style is better? A. if (f1 () && f2 () && f3 ()) do (); B. if (f1 ()) if (f2 ()) if (f3 ()) do ();If three function execution time is longer, is B method is better? Or they are just the same...

C++

C#4.0

C#3.0

"if statement" have multiple parallel conditions,Which style is more efficient I wrote?

21 Jan 2013 by PIEBALDconsult

They should be about the same. I prefer A; it's more polished. Any fool can do B.

C++

C#4.0

C#3.0

"if statement" have multiple parallel conditions,Which style is more efficient I wrote?

21 Jan 2013 by nv3

It actually doesn't matter from a run-time point of view. In other words, A and B will run equally fast. For readability purposes, however, I would always prefer A. or better yetif (f1() && f2() && f3()) doSomething ();

C++

C#4.0

C#3.0

"if statement" have multiple parallel conditions,Which style is more efficient I wrote?

21 Jan 2013 by Abhinav S

I'd prefer A. If (f1 () && f2 () && f3 ()) do (); because it is much more clearer and easier to understand.You are using && which is a short circuit operator.If the first condition fails the second won't execute so there will be no difference in execution time in either case.

C++

C#4.0

C#3.0

"if statement" have multiple parallel conditions,Which style is more efficient I wrote?

21 Jan 2013 by Andreas Gieriet

You left out a 3rd variant:bool hasSomethingToDo = f1() && f2() && f3();if (hasSomethingToDo){ DoSomething();}and a 4th variant:bool hasSomethingToDo = f1() && f2() && f3();if (hasSomethingToDo){ DoSomething();}Usually,...

C++

C#4.0

C#3.0

"if statement" have multiple parallel conditions,Which style is more efficient I wrote?

21 Jan 2013 by H.Brydon

Any C/C++ compiler nowadays will treat both the same way and generate either the same code or almost the same code.A point perhaps more important than performance for this one-liner is maintainability. In most cases, 'A' is the better choice - if the logical tests are truly function names or...

C++

C#4.0

C#3.0

"Link" error in bubblesort function

28 Dec 2016 by Member 12919791

I'm trying to sort an array using the bubblesort method. I get the below "link error", which isn't clear. I can't use gdb/valgrind.~/workspace/pset3/find/ $ make helpers clang -fsanitize=integer -fsanitize=undefined -ggdb3 -O0 -std=c11 -Wall -Werror -Wextra -Wno-sign-compare -Wshadow...

"Link" error in bubblesort function

28 Dec 2016 by Patrice T

May be the linker complain that there is no main function.

"My program shows the correct results...then crashes."

18 Jan 2017 by Member 12955853

So, i'm trying to make a program, that allocates enough space for 5 integers using malloc and a pointer to act as the array, and through a function, i'm doubling the size of the "array" using realloc, inserting the square of every number of the first 5, into the 5 next spaces. It's hard to...

crash

"My program shows the correct results...then crashes."

17 Jan 2017 by Richard MacCutchan

You forgot to return the updated pointer from the double_old function. The code should be: old = double_old(old, old_size, new_size); free(old); }int * double_old(int *old, int old_size, int new_size){ int i=5, a=0; new_size = old_size*3; // why times...

crash

"My program shows the correct results...then crashes."

17 Jan 2017 by Patrice T

When you allocate, it is 5 integersold=(int*) malloc(old_size*sizeof(int));When you reallocate, it is 15 bytes, no matter what is the size of an integer.new_size = old_size*3;old = realloc(old, new_size);

crash

"My program shows the correct results...then crashes."

18 Jan 2017 by CPallini

Don't mess with old_size. Try#include #include int * double_old(int *old, int old_size);int main(void){ int *old; const int old_size = 5; int i; old=(int*) malloc(old_size*sizeof(int)); printf("Enter 5 integers: \n\n\n"); for(i = 0; i

crash

"My program shows the correct results...then crashes."

18 Jan 2017 by nv3

Richard has already pointed out the bug in your program. There is nothing to add to that.As you are new to programming you should try to pick up the right habits from the very beginning. Therefore, I want to point out a couple of things to you could do better in this small example and which...

crash

"no cipher suites in common" SSL Handshaking error

10 Aug 2015 by Member 11898126

Hello everyone!! I am an iOS client and trying to connect to the remote server with my self signed certificate. I add it to the keychain and start socket connection. When I try my code with localhost, I see some encrypted messages, but when I try to connect to the remote server I get the error...

Objective-C

iOS

SSL

"Swift or Objective-C?" that is here the Question!

5 Oct 2014 by KarstenK

Some toughts whether to prefer Objective-C or Swift.

"Trace is off" warning in Unix

3 May 2010 by Poonamol

Hi,I had written a C file which run on unix(AIX) system.In my C file, I used traces for errors.But when I run it, I am receiving warning messages "Trace is off".Can anyone tell me How to ON the traces in Unix.Help me out.Thanks in advance.

"Trace is off" warning in Unix

4 May 2010 by Richard MacCutchan

Use Google and search for "aix trace", or use the AIX help system.

"u" Postfix in values

26 Oct 2012 by steven8Gerrard

What does representation in 0*0x100u mean in C . If it end with "b" . I know its binary . What is "u"

C++

"u" Postfix in values

26 Oct 2012 by BobJanova

U means unsigned, there's a full set here[^].

C++

"u" Postfix in values

26 Oct 2012 by psychic6000

u is for unsigned, btw if you are multiplying it by 0 then it doesnt matter...

C++

#C programming question

24 Apr 2017 by OriginalGriff

We do not do your homework: it is set for a reason. It is there so that you think about what you have been told, and try to understand it. It is also there so that your tutor can identify areas where you are weak, and focus more attention on remedial action. Try it yourself, you may find it is...

#C programming question

24 Apr 2017 by Patrice T

Quote: iwanna solve this question as fast as you can Then start to work, we are not a code on request service; If you are in hurry, try paying services. We do not do your HomeWork. HomeWork is not set to test your skills at begging other people to do your work, it is set to make you think and...

#error You now need to define either FIXED_POINT or FLOATING_POINT

1 Nov 2011 by Mehdi Gholam

Try the forum on : http://ioquake3.org/[^]They can probably help you better.

Ubuntu

Linux

#error You now need to define either FIXED_POINT or FLOATING_POINT

3 May 2019 by coffeenet

Hi,I am trying to compile ioauek3 on our IBM PowerPC machine that is running with a Linux environment.I got this error:#error You now need to define either FIXED_POINT or FLOATING_POINTI found that many say the fix is:make speex-reconfI...

Ubuntu

Linux

#include <stdio.h> int main() { int a=(1, 2, 3); int b=(3, 2, 1); for(; a>0; a--) for(; b<3; b++); printf("%d ", a*b); return 0; }

24 Oct 2017 by Member 13483115

I have tried a lot but I didn't get solved will you help me out with this thank you...!! #include int main() { int a=(1, 2, 3); int b=(3, 2, 1); for(; a>0; a--) for(; b

#include <stdio.h> int main() { int a=(1, 2, 3); int b=(3, 2, 1); for(; a>0; a--) for(; b<3; b++); printf("%d ", a*b); return 0; }

24 Oct 2017 by C^hris L^osinger

Look into C's comma operator. When you know how that works, you will know what a and b will be initialized to.

#include <stdio.h> int main() { int a=(1, 2, 3); int b=(3, 2, 1); for(; a>0; a--) for(; b<3; b++); printf("%d ", a*b); return 0; }

24 Oct 2017 by OriginalGriff

The Comma operator looks like this: x = a, b; It evaluates the expression a, discards the result, evaluates b and returns it. So the code for a and b both get executed, and x is set to the value of b. Your code is just an extension of that: effectively x = ((a, b) , c); So it evaluates a and...

#Include little toolkit

14 Mar 2013 by Bartlomiej Filipek

Include Guards, Pragma Once, Predeclarations and other hints that might be useful when dealing with includes.

C++

#include<studio.h> main() { int x=10, y; print("enter a number"); scan ("%d", &x); y=x++ + ++x + ++x + ++x + ++x; print("result:%d", y):;

2 Jun 2018 by Member 13856095

For manual calculation getting 64 but in turbo C complier getting 70 and in Java 64 how it varies can anyone explain What I have tried: If taking x=10 by doing the manual calculation getting the answer 64 but in complier getting 70 how is it possible

#include<studio.h> main() { int x=10, y; print("enter a number"); scan ("%d", &x); y=x++ + ++x + ++x + ++x + ++x; print("result:%d", y):;

2 Jun 2018 by OriginalGriff

Simple: Why does x = ++x + x++ give me the wrong answer?[^] BTW: in future, don't put your code as the subject line - that's what "What I have tried" is there for. The subject line should be short and sweet, and quick overview of the problem in English as much as possible. Perhaps "x++ giving...

#include<studio.h> main() { int x=10, y; print("enter a number"); scan ("%d", &x); y=x++ + ++x + ++x + ++x + ++x; print("result:%d", y):;

2 Jun 2018 by Patrice T

You are in gray zone: the code is legal, but unpredictable. y=x++ + ++x + ++x + ++x + ++x; The compiler is free to reorder what is in this code. for x=10, y can be anywhere between 50 and 75. The only advice is: never mess with multiple increment/decrement operations in a single line of code.

%zu marker for sizeof() function doesn't return value

24 Jun 2011 by Albert Holguin

%zu is not a valid modifier for printf()(the z is not a modifier at all):http://www.cplusplus.com/reference/clibrary/cstdio/printf/[^]use this instead and it should work just fine:printf ("The chapters array uses %u bytes of memory.\n", sizeof(chapters));

%zu marker for sizeof() function doesn't return value

24 Jun 2011 by Member 641034

The %zu marker should return value when You use sizeof() function. In a console application there is a message "The chapters array uses zu bytes of memory." It should return number of bytes used by these two stings, not this "zu".#include #include #include...

'\A' not working in C in VS code

12 Sep 2022 by Everything Select

In my laptop, I've tried to use the beep escape sequence (i.e. '\a'), it worked fie in codeblocks, but it isn't working at all in vs code even with the same code as what I wrote in codeblocks. I've seen c tutorials in c, so I do know that vs code...

'\A' not working in C in VS code

12 Sep 2022 by Dave Kreskowiak

Works fine for me, though if you're expecting a beep out of the internal PC speaker, that's not where the sound comes from. Today, a "beep" would be whatever sound is configured in the Windows Sound control panel and come out of the sound...

'\A' not working in C in VS code

12 Sep 2022 by k5054

printf() may not flush the output buffer until a newline ('\n') is seen, or the output buffer is full. Try adding fflush(stdout); after each printf(), to force the buffer to be flushed.

'brcc' is not recognized as an internal or external command, operable program or batch file.

26 May 2015 by Member 3612029

I have installed Borland 5.5 C++ in my machine.I have installed it in C:It's path is like this. C:\BorlandAlso I have set this path information in the System PATH variable as like this. C:\Borland\BCC55\BinAfter setting this path I am able to call bcc32.exe from the command prompt and...

C++/CLI

'brcc' is not recognized as an internal or external command, operable program or batch file.

27 May 2015 by Jochen Arndt

The error shows:Quote:'brcc' is not recognized as an internal or external commandSo it seems you are using 'brcc' instead of 'brcc32' somewhere in your make file.

C++/CLI

'database is locked' in sqlite table

25 Jun 2013 by SanjeevJayaram

While inserting and updating the sqlite database table it works for the first time correctly. while running it for second time error comes as 'database is locked'.what is wrong in it.

'Else if' is not working

26 Oct 2021 by Jahirul Sarker

[Updated] I was trying to solve this problem: 1098 - Sequence IJ 4 - URI Online Judge[^] I used else if statement to print integer when needed. It worked for two conditions but it's not working for the third condition. The code I wrote is given...

'Else if' is not working

20 Oct 2021 by Rick York

What is happening is you are bumping up against small, numerical errors in floating point values. The value of i after ten 0.2s were added will not match 2.0 exactly. It probably will out to be about eight or nine decimal places but not...

'Else if' is not working

23 Oct 2021 by Patrice T

Quote: I used else if statement to print integer when needed. It worked for two conditions but it's not working for the third condition. The code I wrote is given below. Because your code says so: #include int main(){ int a,b,c,d,e,...

'Else if' is not working

26 Oct 2021 by Jahirul Sarker

Here's the solution: #include int main(){ double i,j; for(i=0; i0.9&&i

'Hello World, Goodbye .XIB!' -- A .XIB'less Hello World Application

14 Sep 2010 by Ohmu

An article that creates a simple iPhone application that displays a graphic then cuts out the .XIB, and completes this just from the code.

'Mutex' undeclared (first use in this function)

11 Oct 2018 by Member 14016042

I want to create a program that receives a number N as an argument and starts N threads each displaying one of the numbers from 1 to N synchronously, to produce an ordered sequence (12 ... N) *. Where, it is necessary to use one and the same function executed by all threads and pass the number...

Linux

multi-threading

'Mutex' undeclared (first use in this function)

11 Oct 2018 by OriginalGriff

mutex is declared as part of your main function: int main(int argc, char *argv[]) { N = atoi(argv[1]); sem_t mutex[N]; which makes it a local variable - its scope is limited to the set of curly brackets which most recently enclose it - the main function itself. And then you try to...

Linux

multi-threading

'Mutex' undeclared (first use in this function)

12 Oct 2018 by KarstenK

Really strange that the first error is at this line. The compiler should complain already on: sem_t mutex[N]; This code shuld do the job sem_t *mutex = malloc( sizeof( sem_t ) * N ); //at the ende free( mutex ); Tip: set the warning level higher. This warnings are helping you to write good code :-)

Linux

multi-threading

'Mutex' undeclared (first use in this function)

11 Oct 2018 by Member 14016042

Sorry I copied the wrong code. #include #include #include #include #include //#include // pour les threads #include // pour les semaphores #include // pour les flags O_CREAT, O_EXCL, ... //...

Linux

multi-threading

'Mutex' undeclared (first use in this function)

11 Oct 2018 by CHill60

If the code you have posted as a solution is genuinely the code causing the error then try changing sem_wait(& mutex[N-1]); to sem_wait(&mutex[N-1]);

Linux

multi-threading

'sscheck' is not recognized as an internal or external command, operable program or batch file.

27 May 2015 by Member 3612029

Hi All,I have a make file, where it generates .Obj files and .res files successfully. After generating these files, there is command called as "@sscheck abc.dll".I am using Borland 5.5 compiler and have installed it in C:\. I have checked the Bin folder, but there is no such command as...

C++/CLI

'sscheck' is not recognized as an internal or external command, operable program or batch file.

27 May 2015 by CPallini

This page might interest you: "What is the output of SSCheck.Value in VB6?"[^].

C++/CLI

( C programming language) given a positive integer N, what is the minimum positive integer K such that K! Is a multiple of the square of N?

12 Jan 2021 by honotard

Pretty new to programming, been doing some pretty basic stuff but I came across a more complicated one now, not sure how to start with it. Task: Given a positive integer N, what is the minimum positive integer K such that K! is a multiple of the...

( C programming language) given a positive integer N, what is the minimum positive integer K such that K! Is a multiple of the square of N?

12 Jan 2021 by CPallini

[update] The 'Output' looks wrong to me. Look, for instance, at the last input item, namely 24. The output reports 48 as solution. However, (9!)/(24^2) = 630 so 9 looks a better fit to me. Incidentally, considering the details of such a case...

( C programming language) given a positive integer N, what is the minimum positive integer K such that K! Is a multiple of the square of N?

9 Jan 2021 by OriginalGriff

We are more than willing to help those that are stuck: but that doesn't mean that we are here to do it all for you! We can't do all the work, you are either getting paid for this, or it's part of your grades and it wouldn't be at all fair for us...

( C programming language) given a positive integer N, what is the minimum positive integer K such that K! Is a multiple of the square of N?

12 Jan 2021 by Patrice T

Quote: Nothing so far. Having problems with implementing the whole thing cuz I'm truly not sure how to do it. You need to understand the problem and its solving. First step, train yourself solving the problem by hand with some small N. When...

( C programming language) given a positive integer N, what is the minimum positive integer K such that K! Is a multiple of the square of N?

12 Jan 2021 by Luc Pattyn

This is a mathematical problem as well as a programming problem. You need to understand the maths involved and come up with a sensible approach before even attempting to program anything. And then you must keep in mind that K! is growing rapidly...

(C language) can't run a basic hello program in codeblocks IDE?

28 Feb 2021 by Member 15086508

Hey all noob programmer here. I thought Instead of watching tutorials just to jump In and build stuff and learn on the go and trial and error rather than just being stuck In tutorial limbo. First Is obvious a basic hello world Program easy done....

Ubuntu

(C language) can't run a basic hello program in codeblocks IDE?

28 Feb 2021 by OriginalGriff

Because the C language is case sensitive: "I" is not the same as "i" Change this line:Int main(){ To this:int main(){ And in future, don't take photos of your screen and post links to them: copy'n'paste the actual text and post that here,...

Ubuntu

(C language) I don't understand multi dimensional arrays using pointers

25 Oct 2023 by Member 16116753

I don't know If I can ask about C language, sorry if I can't. I tried to understand these two codes: int *pv = (int*) malloc(5 * sizeof(int)); for(int i=0; i

(C language) I don't understand multi dimensional arrays using pointers

16 Oct 2023 by OriginalGriff

Of course you can ask about C - just because it is a fifty year old language and shows it's age badly doesn't mean you can't ask about it! If you are learning it as your first language though, it's going to be of little help in getting you a job...

(C language) I don't understand multi dimensional arrays using pointers

16 Oct 2023 by CPallini

malloc (see, for instance: malloc - cppreference.com[^]) allocates on the heap, while, in the 'simpler example', the array is allocated on the stack. If you need a bidimensional dynamically allocated array (specifically a jagged array[^]) then...

(C language) I don't understand multi dimensional arrays using pointers

16 Oct 2023 by Maxim Kartavenkov

This is the generic understanding of the pointers itself. The pointer means that it contains an address of the memory. In you example you have an array: int x[5] = {1, 2, 3, 4, 5}; So the x is the pointer to the array in memory with the 5 integer...

(C language) I don't understand multi dimensional arrays using pointers

16 Oct 2023 by KarstenK

malloc only allocated some memory block and it is your task to deal with that memory and use some typed pointer to work with it. For complex solution I recommend the usage of structs which give you (and the compiler) some help how to deal with...

(C language) syntax error near unexpected token '('

14 Jan 2021 by honotard

Been doing a task in C programming language. I had a problem with fmod which gave me a specific error after trying to execute and give permission.(Undefined reference to fmod, error ld returned 1 exit status). Some people helped me on this...

Linux

terminal

(C language) syntax error near unexpected token '('

14 Jan 2021 by Afzaal Ahmad Zeeshan

From a high-level overview, the code looks nice, secondly the code "compiles" just fine too: C++ Shell[^]. What I feel like is there might be an invalid character (most likely an invisible one) that is causing trouble for the compiler. Oh, and...

Linux

terminal

(C language) syntax error near unexpected token '('

14 Jan 2021 by OriginalGriff

I just tried it using gcc via rextester, and your code shows no such error: Compilation time: 0.12 sec, absolute service time: 0,29 sec Error(s): 1693378824/source.c: In function ‘main’: 1693378824/source.c:12:1: warning: ignoring return value of...

Linux

terminal

(C language) syntax error near unexpected token '('

14 Jan 2021 by CPallini

Your code compiles fine (as already noted by our Griff). Just link it with the math library in order to obtain the executable, e.g. gcc -Wall foo.c -lm Please note, factorial results become 'unmanageable' very fast: even 64 bit integers can...

Linux

terminal

(C programming language) login feature

4 Nov 2019 by Member 14643779

This is a mini c project I working right now. I try to login after I register a new account,but even I input the correct information still fail to login, can't find the error. The code is quite a lots, but I tried my best to minimize. Code: This is the main interface when the console run, for...

(C programming language) login feature

3 Nov 2019 by OriginalGriff

Compiling does not mean your code is right! :laugh: Think of the development process as writing an email: compiling successfully means that you wrote the email in the right language - English, rather than German for example - not that the email contained the message you wanted to send. So now...

(C programming language) login feature

4 Nov 2019 by Richard MacCutchan

I would suggest you start again. Your code seems to be far too complex for such a simple system, and there are one or two things that are a waste of time. Start with a system that just takes a userid and a password, so you can minimise the amount of code that needs to be tested. For a...

(contact and email folders in listboxes) outlook email synchronization

7 Apr 2014 by Bhatt Aniruddh

hi all,i have two list boxes. i want contact synchronization folder and email synchronization folder in list boexs.i tried following code...private void EnumerateFoldersInDefaultStore(){ Outlook.Folder root = Application.Session.DefaultStore.GetRootFolder() as...

C#3.5

C#5.0

(double) aithmetic not accurate

4 Aug 2013 by z3ngew

Hello everyone,I made the following function, which i use to drive stepper motorint16 position2steps(double position){ int16 steps = 0; if(!strcmp("HALF", step_mode)) steps = (position / half_angle); else steps = (position / step_angle); return...

C++

(double) aithmetic not accurate

5 Aug 2013 by User 59241

Quote:but if i use this function frequently it give 1 for some time but then it return 0 This is a very strange comment because it should always return the same output for the same input.Nevertheless not all numbers can be exactly represented as a double. This means you end up with...

C++

(double) aithmetic not accurate

5 Aug 2013 by Jochen Arndt

If you want to round to the nearest integer, add a value of 0.5 to the result before converting to an integer. If you want to round down, add a small value (e.g. 0.01 in your case).The problem is that most rational numbers can't be represented exactly using floating point numbers. If you...

C++

(double) aithmetic not accurate

5 Aug 2013 by pasztorpisti

Floating point numbers can not accurately represent every real numbers, just a few of them. If you say for example d=1.333 then d will contain a floating point value that is near to 1.333 but isn't exactly 1.333 because it can not be accurately represented. The same is true to 0.1 and 0.9 and...

C++

(double) aithmetic not accurate

5 Aug 2013 by Philippe Mori

In such case, I think you should round number before converting them to integer.In many cases, it might not matters much. You have taken an example where you are really near a "split" point. In practice, if you round every thing, then instead of having the problem for number that are a whole...

C++

(Memory and Resource) Leak Detection for WinCE

23 May 2012 by Sergeant Kolja

This is an alternative for "Memory leak detection for WinCE".

(Sobel_Edge detection) How to solve this half image sobel coding problem?

20 Oct 2010 by zhisen

The following program i done are only able to detect half of the edge , can anyone solve this problem for me please ? thanks #include #include #include void main(void){FILE *fptr1, *fptr2;int row, col, r, c, i, j, max_gray;int threshold;int...

(SOLVED) Where am I going wrong? (New to this)

18 Jan 2015 by KeketZee

I'm doing this in ***Visual Studios: Visual C++/win32/Win32 Console Application*** I'm aware that it looks more like C. I tried using the variables in my C++ book, But the program didn't read them. Is there a different #Include I should be using so it works? What should I be using instead of...

C++

(SOLVED) Where am I going wrong? (New to this)

18 Jan 2015 by CPallini

If you really want to use C-like code then you have to use character arrays for player names. And you have to always check the return value of scanf.Using std::string together with std::cin, std::cout for I/O would greatly help you.Moreover I would use a struct (or a class) for holding...

C++

(SOLVED) Where am I going wrong? (New to this)

18 Jan 2015 by OriginalGriff

It's difficult to explain exactly what you are doing wrong without being able to see when your eyes start to glaze over...You are declaring your player names as charchar p1;char p2;char p3;but then you use them as a string: //Asks for Player Names printf("Player 1, Please...

C++

(Windows)Sleep in kernel driver

4 Aug 2013 by xXTariqoO

Hello,i started to learn about driver programmingi want to make my driver do a thing every 2000 ms for exampleand in c++ i will be like thiswhile(true){Sleep(2000);//(2 Seconds)DoSomething();}the question is :how to do like it in c driverit must be like...

Windows

WDK

driver

(Windows)Sleep in kernel driver

4 Aug 2013 by User 59241

The principle is exactly the same as creating delays in user mode. Sleep() has very limited value and you can use Google to find out why. Ultimately you need waitable timers.(1) Create a kernel timer via...

Windows

WDK

driver

(Windows)Sleep in kernel driver

25 May 2014 by zaki al

Also you can use KeDelayExcutionThreadThird parameter of this function is in 100 nano seconds(0.01 micro seconds)http://msdn.microsoft.com/en-us/library/windows/hardware/ff551986%28v=vs.85%29.aspx[^]

Windows

WDK

driver

* triangle...

15 Jul 2010 by vikasvds

Hi all,A diamond made of * given below can be easily printed on the screen using some loops. * *** ***** ******* ***** *** *But i have got a question from one of my friend says print the same * diamond using only one loop.I have tried with many ways such as...

* triangle...

15 Jul 2010 by Dalek Dave

What code have you written already?On seeing that I can probably point you in the right direction quite quickly.

* triangle...

15 Jul 2010 by Andrew Rissing

You could technically print it without any loops what so ever. You think about what you're doing with two loops and reorganize the logic without the inner loop.Sorry, I cannot give you more based on the lack of code and the chance that this is really just homework in disguise.

* triangle...

16 Jul 2010 by Aescleal

Just print it on the screen using one write to the console - it's only hello_world in disguise. The only time you'll need a loop is if you're doing something that changes every run of the program and is set up by the program's users.Cheers,AshPS: As other people have already pointed...

* triangle...

15 Jul 2010 by vikasvds

Hi all,Sorry to not to paste code written by me.I am almost able to get it with one loops but i am not liking too many variables and if-else.i am unable to think of any single straight logic/equation to do the sameit is below here -#define ROWS 10int main(void){ int i =...

* triangle...

15 Jul 2010 by Sauro Viti

You can work around the code snippet below:char szSpaces[] = " ";char szStars[] = "*****************************************";int iSpaces = 5;int iStars = 7;printf("%.*s%.*s\n", iSpaces, szSpaces, iStars, szStars);Such a format string instruct the printf...

* triangle...

16 Jul 2010 by Sauro Viti

Try this:#include #include const char szSpaces[] = " ";const char szStars[] = "********************************************************************************";int main(int argc, char* argv[]){ if (argc != 2) return...

*** ERROR L104: MULTIPLE PUBLIC DEFINITIONS

12 Oct 2010 by Swapnil_katre

I have Declared all my declaration in one file called ADeclaration.h and included this file in all my module C files.i.e.I have MAIN.c (MAIN) Port_IO.c (PORT_IO) STORAGE.c (STORAGE) TEMPERATURE.c (TEMPERATURE) CONVERT.c (CONVERT) UART.c (UART) RTC.c (RTC) I2C.c (I2C)...

*** ERROR L104: MULTIPLE PUBLIC DEFINITIONS

12 Oct 2010 by E.F. Nijboer

Simply put this in your ADeclaration.h to avoid multiple inclusions:#ifndef ADECLARATION_H#define ADECLARATION_H // Contents of ADeclaration.h #endifGood luck!