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C QUESTIONS

how to implement (PHP Function)array_map funciton in c?
how to implement (PHP Function)array_map funciton in c?
hop of those help? Here is some reference about function as parameter,How do you pass a function as a parameter in C?
TAG : c
Date : November 28 2020, 09:01 AM , By : Dan
Find a sum of two distinct numbers from the set, closest to the query number
Find a sum of two distinct numbers from the set, closest to the query number
Hope that helps First, input the n number of integers into an array. Sort them in O(n.log(n)) time. Now, for each query of m, do as follows:
TAG : c
Date : November 28 2020, 09:01 AM , By : Daniel
Trouble with array in function
Trouble with array in function
This might help you You need to pass your array rowavg[] or make it global.Here is some correction:
TAG : c
Date : November 28 2020, 09:01 AM , By : user4580059
C, Piping messages to child processes not working. Why?
C, Piping messages to child processes not working. Why?
With these it helps You have undefined behavior in the code. You have an array of pointers to characters msg, and you use this array when reading input from the user.The first problem here is that the pointers in the array are uninitialized. The valu
TAG : c
Date : November 28 2020, 09:01 AM , By : La.Abderrahim
CreateThread() passing struct arguments weirdly
CreateThread() passing struct arguments weirdly
To fix the issue you can do I'm passing a struct to CreateThread() function. The same code on another machine works fine. But on my machine, "SendItem" always becomes 0xccccccc Bad Ptr>. Does anyone know why?
TAG : c
Date : November 28 2020, 09:01 AM , By : Dilip Chowdary
How to change a char to ASCII form?
How to change a char to ASCII form?
will help you I need change my program, how do I use some function change a char to ASCII? my mobile receive data from 8051, always show '0', it's not true.
TAG : c
Date : November 28 2020, 09:01 AM , By : Jai
Pipes, dup2 and exec()
Pipes, dup2 and exec()
will be helpful for those in need You need to close all the pipe descriptors in both the parent process and the child process (after duplication in the child process). In your code the main issue is that, the wc process does not exit because there ar
TAG : c
Date : November 28 2020, 09:01 AM , By : William Salazar
I can't get this mean calculated, it just displays 0 all the time
I can't get this mean calculated, it just displays 0 all the time
should help you out I cant get this to show the mean, where have a made a mistake? it just seems to skip past the mean function altogether for some reason.
TAG : c
Date : November 28 2020, 09:01 AM , By : Bufftron
Expected ' ' before '=' token in struct definition
Expected ' ' before '=' token in struct definition
fixed the issue. Will look into that further I assume you are trying to set a default value for a field in a struct definition.You cannot do this.
TAG : c
Date : November 27 2020, 09:01 AM , By : Nivedita K
How to implement a MATLAB lowpass filter in C
How to implement a MATLAB lowpass filter in C
hop of those help? ok, you said that you get your coefficients from a [B,A]= butter(..) likewise filter (try getting them in Z domain AKA digital filter), those A,B coefficients correspond to a simple transfer function you know
TAG : c
Date : November 27 2020, 09:01 AM , By : Victor Diaz Galdames
Convert hexidecimal char array to u8 array in C
Convert hexidecimal char array to u8 array in C
will help you Right now I have a u8 array that I successfully converted to a hexidecimal char array. Now, trying to change it back into a u8 array has been a doozy. I tried this code: , You are creating undefined behavior with these lines:
TAG : c
Date : November 27 2020, 09:01 AM , By : Rifki Barosa
Delete function in Binary Tree in C
Delete function in Binary Tree in C
I wish this help you Basically i was only replacing the node with itself, but this can be solved by replacing the deleted node with the minimum element in the right subtree or the maximum element in the left subtree.The function that works:
TAG : c
Date : November 27 2020, 09:01 AM , By : Pyro
Why (int)((unsigned int)((int)v)?
Why (int)((unsigned int)((int)v)?
hope this fix your issue The website in which I found this code , Quoting the C Standard 6.5.7p5:
TAG : c
Date : November 27 2020, 09:01 AM , By : Anu
Creating a matrix in a structure
Creating a matrix in a structure
will be helpful for those in need I am trying to create a structure that will have two integer values, an array, and two 2-D matrices using my code below. I can initialize the structure with the integers and array just fine, and my 'Gen' function wil
TAG : c
Date : November 26 2020, 09:01 AM , By : Majd
C Recursion runtime error
C Recursion runtime error
To fix this issue As it's already said, the reason is your main declaration.The returned value of main indicates the exit code of program. The right declaration is
TAG : c
Date : November 26 2020, 09:01 AM , By : Michael Laroche
C: pointer to 2d array
C: pointer to 2d array
Any of those help B is an array of arrays of int. It is not a pointer and therefore does not point to anything. However, under most circumstances, where it appears in code, B is automatically converted to a pointer to the first element of the array.
TAG : c
Date : November 25 2020, 09:00 AM , By : Harini B
How to free a pointer in a structure array?
How to free a pointer in a structure array?
may help you . You are calling strcpy() which requires a null terminator, so you need to make sure you have room for the null terminator. Your current code does not include space for the null terminator:
TAG : c
Date : November 25 2020, 09:00 AM , By : JRichards
gcc -O optimization: Help me understand the effect
gcc -O optimization: Help me understand the effect
wish of those help oauh's answer addresses why this is undefined behaviour, but not why the problem only appears with -O.-O makes the compiler try harder to find things to optimize. In this case, it seems to have realised that x
TAG : c
Date : November 25 2020, 09:00 AM , By : Guillaume Maquart Ph
Errors on code (state machine)
Errors on code (state machine)
fixed the issue. Will look into that further When I type 123 at the command line, your program is internally storing: 1*1 + 2*10 + 3*100 = 321 which is reversed, fine. But then, your function to reverse 321 returns 146 instead of 123. Something is de
TAG : c
Date : November 25 2020, 09:00 AM , By : Tango5
Does node equals node on a struct initializes the rest of the struct attributes?
Does node equals node on a struct initializes the rest of the struct attributes?
I wish this helpful for you I have a struct , In this statement
TAG : c
Date : November 24 2020, 09:00 AM , By : Khals
C program to copy one string into other string without using library functions
C program to copy one string into other string without using library functions
it should still fix some issue C strings need to be null terminated. Ie they need a '\0' character at the end, so common string expressions can tell where the string ends. String functions like strcpy and printf("%s... look for this null termination
TAG : c
Date : November 24 2020, 09:00 AM , By : Musty
Macro representing a pin on a microchip
Macro representing a pin on a microchip
will help you I'm trying to write some code in C for an atmega microcontroller and I have a working macro BIT_SET for setting a single bit: , You can write macros such that the preprocessor will expand
TAG : c
Date : November 24 2020, 09:00 AM , By : James
C code workks in Mac (Darwin 13.4), but not in Linux (2.6.32)
C code workks in Mac (Darwin 13.4), but not in Linux (2.6.32)
it should still fix some issue Disregard. Solved it. Here's what the problem was: I was waiting on the foreground child process in the main program loop, and I was also waiting on it in the signal handler. In the main loop I was using waitoptions = 0
TAG : c
Date : November 24 2020, 09:00 AM , By : Ravi G
How do I read this complex C declaration?
How do I read this complex C declaration?
I wish this helpful for you I am new to C and am having a problem reading this matrix declaration in a function.
TAG : c
Date : November 23 2020, 09:01 AM , By : Naisargi
Reading a file with scanf and a do while loop
Reading a file with scanf and a do while loop
will help you I'm reading a file with scanf. Each line is just one data field, so I have a a do while loop. Basically what I do is, read the first information for build the root (i'm using this for build a BST). But when gets inside the do while. Rea
TAG : c
Date : November 22 2020, 02:59 PM , By : Mohammed Nazamul Hoq
why is the recursion used in finding the factorial of a number?
why is the recursion used in finding the factorial of a number?
it should still fix some issue You don't have to use recursion. Because C doesn't support so-called optimization of tail recursion calls, you should avoid recursion where it could be replaced by a simple loop. But C does support recursion at all, and
TAG : c
Date : November 22 2020, 02:59 PM , By : Kavya
Inverting array elements (bitwise) doesn't work
Inverting array elements (bitwise) doesn't work
like below fixes the issue I've tried to invert an array element today and it didn't work. Is there a reason that e.g.
TAG : c
Date : November 22 2020, 02:59 PM , By : mavenpolly
git blame-like annotation of source files with gcov
git blame-like annotation of source files with gcov
like below fixes the issue I'm going to assume you are referring to gcovr when you say gcov, since gcov does not output to HTML format. gcovr does output to HTML though. gcovr is basically just a wrapper for gcov.In order to get the annotated source
TAG : c
Date : November 22 2020, 02:59 PM , By : Chris
Error using pthread on Windows with Mingw
Error using pthread on Windows with Mingw
To fix the issue you can do Solved!AFAIK there is no portable pthread library for Windows under Mingw.
TAG : c
Date : November 22 2020, 02:59 PM , By : sierralx
How to create a static library with a Makefile from C source code
How to create a static library with a Makefile from C source code
seems to work fine You chain targets through prerequisites.To get what you want (and to have make do it by default) you need to add install as a prerequisite of your all target (though we'll be renaming that in a minute) and either replace $(TARGET)
TAG : c
Date : November 22 2020, 02:42 PM , By : pwnedbyefa
Why are there two different ways of initializing a pointer in C
Why are there two different ways of initializing a pointer in C
To fix this issue The first way looks like this: , I believe what's confusing you is the syntax
TAG : c
Date : November 22 2020, 02:42 PM , By : Fitob
Program runs too slowly with large input - C
Program runs too slowly with large input - C
To fix the issue you can do The goal for this program is for it to count the number of instances that two consecutive letters are identical and print this number for every test case. The input can be up to 1,000,000 characters long (thus the size of
TAG : c
Date : November 22 2020, 02:42 PM , By : MetinYakar.NET
Dangling pointer example confusion
Dangling pointer example confusion
may help you . Why isn't the following example correct? Why doesn't it demonstrate a dangling pointer? My teacher said it doesn't show the dangling pointer. in advance! , To cite Wikipedia:
TAG : c
Date : November 22 2020, 09:00 AM , By : Masho
Why is this program running when input is 1?
Why is this program running when input is 1?
I hope this helps . I wrote a C program to use recursive functions to find the factorial of a number and the code is given below:
TAG : c
Date : November 22 2020, 09:00 AM , By : Ahmed Seodi
Malloc() doesn't work + char array clear
Malloc() doesn't work + char array clear
seems to work fine There are a few problems - rather than describe each bug individually I'll just post a fixed version and you can compare it with your original code:
TAG : c
Date : November 22 2020, 09:00 AM , By : Carodusi
Reading debug registers on linux
Reading debug registers on linux
this will help You need to use a 64 bit register in 64 bit mode, that's why it doesn't compile (presumably, since you have not showed the actual code you tried...)In any case, you can't read debug registers in user mode. You should say why you need a
TAG : c
Date : November 21 2020, 09:01 AM , By : Conor Lawton
Socket Programming - Server content written to Client (write())
Socket Programming - Server content written to Client (write())
like below fixes the issue In other words, is there a function more similar to printf() than write(), that writes to a client?
TAG : c
Date : November 21 2020, 09:01 AM , By : bhav
Incrementing a string in C
Incrementing a string in C
it fixes the issue When you increment a pointer, it points to the next object. Since these are pointers to characters, incrementing them makes them point to the next character. Your foobar function just throws away the incremented values though. It d
TAG : c
Date : November 20 2020, 09:01 AM , By : Rajeev Mathew
what does a[0] = addr & 0xff?
what does a[0] = addr & 0xff?
fixed the issue. Will look into that further The variable addr is 32 bits of data, while each element in the array a is 8 bits. What the code does is copy the 32 bits of addr into the array a, one byte at a time.Lets take this line:
TAG : c
Date : November 19 2020, 09:01 AM , By : user4575916
unexpected EOF while looking for matching `'' while using execve()
unexpected EOF while looking for matching `'' while using execve()
help you fix your problem I try to run multiple commands (or using simple output redirection) via execve(). , Works for me if done like this:
TAG : c
Date : November 19 2020, 09:01 AM , By : DaytonaRob
What's the purpose of stack pointer alignment in the prologue of main()
What's the purpose of stack pointer alignment in the prologue of main()
I wish this helpful for you The System V AMD64 ABI (x86-64 ABI) requires 16-byte stack alignment. double requires 8-byte alignment and SSE extensions require 16-byte alignment. gcc documentation points it in its documentation for -mpreferred-stack-bo
TAG : c
Date : November 19 2020, 09:01 AM , By : Deepak
Time from startup in linux kernel
Time from startup in linux kernel
Any of those help What about using get_monotonic_boottime? jiffies are initialized to 5 minutes before boot to ensure that there is an overflow soon after booting and detect bugs.
TAG : c
Date : November 19 2020, 12:35 AM , By : Fareed Farooqi
UNIX socket connection refused
UNIX socket connection refused
hop of those help? Under OS-X, I've got process named 'listener' that is waiting on 'accept' to read data from local unix socket named listener_socket. unfortunately, any attempt to connect that socket terminate in 'connection refused' error. , The s
TAG : c
Date : November 19 2020, 12:35 AM , By : jatin sehgal
How to programmatically set IP address on Windows 7 using C
How to programmatically set IP address on Windows 7 using C
this will help I think you need AddIPAddress() API.Refer to AddIPAddress function at MSDN documentation with a good example.
TAG : c
Date : November 19 2020, 12:35 AM , By : Karasas Simainei Egg
programming a gpu without using any library like cuda or opencl?
programming a gpu without using any library like cuda or opencl?
wish help you to fix your issue The really short answer, is no, you can't do that. All of the standard "C or C++ like" GPU programming models I am familiar with require you to use an API (compute APIs like OpenCL or OpenCL, or graphics APIs like Open
TAG : c
Date : November 18 2020, 09:01 AM , By : Armin
C "printf" Different output in Linux and Mac
C "printf" Different output in Linux and Mac
should help you out Parameters are evaluated in an undefined order, so the i+=1 can occur before or after the i.This is undefined, because the order of elements on the stack can be different, causing some compilers which have one order of calling con
TAG : c
Date : November 18 2020, 09:01 AM , By : theFinges
Bit rearrangement/manipulation in C
Bit rearrangement/manipulation in C
I hope this helps you . I think I understood what he wants to achieve. This code may help you:
TAG : c
Date : November 17 2020, 09:01 AM , By : Gorjan Arsovski
How to find occurences of a digit with 4 in it within 50?
How to find occurences of a digit with 4 in it within 50?
will help you You could try to use a function that repeatedly tests each digit in the number to see if it is equal to 4, like so:
TAG : c
Date : November 17 2020, 09:01 AM , By : Wayne Robinson
Read string separated by comma
Read string separated by comma
This might help you For integer input you can do this. , %s eats your separator(,) too.
TAG : c
Date : November 17 2020, 09:01 AM , By : Thomas Milani
how to optimize the C code, when m is too big, it can't operation
how to optimize the C code, when m is too big, it can't operation
seems to work fine You can reduce some of the computations by keeping running minimum values in each of the loops.
TAG : c
Date : November 16 2020, 09:01 AM , By : Ashwini Ramesh Salun
GCC Error Infinite While Loop
GCC Error Infinite While Loop
This might help you , Add the following to the top of the file:
TAG : c
Date : November 16 2020, 09:01 AM , By : KAD
Row-major vs Column-major confusion
Row-major vs Column-major confusion
will help you Let's look at algebra first; algebra doesn't even have a notion of "memory layout" and stuff.From an algebraic pov, a MxN real matrix can act on a |R^N vector on its right side and yield a |R^M vector.
TAG : c
Date : November 15 2020, 09:01 AM , By : Cdr ANALYSIS WING
Parsing memory mapped file C
Parsing memory mapped file C
Does that help You are opening file with O_RDONLY flag, and mmap it with PROT_READ - which is all good. However, note that strtok() function will modify its argument. In other words, you are breaking your promise to never write to memory location tha
TAG : c
Date : November 15 2020, 09:01 AM , By : Alex Forrana
going out of bounds in array of structs in C
going out of bounds in array of structs in C
To fix this issue Accessing out-of-bounds is not guaranteed to segfault. It is defined by the C standard as undefined behavior, i.e. anything can happen, including seemingly error-free behavior.
TAG : c
Date : November 15 2020, 09:01 AM , By : Bmloho
fprintf in do while loop wrote only one line in file C
fprintf in do while loop wrote only one line in file C
To fix this issue You are doing some logical mistake. You are asking whether exit or not. If user does not want to exit, then he would press n. So, to continue the loop, the answer should be equal to n, right?Modified version of your program:
TAG : c
Date : November 15 2020, 09:01 AM , By : Barkha456
Reading and Writing to Files in C
Reading and Writing to Files in C
will help you For the first issue, the problem is that the loop logic is incorrect. On each iteration is stores the previous read data, reads the next data and then goes back to the top of the loop. The problem with this is that the next data is not
TAG : c
Date : November 14 2020, 09:01 AM , By : JavahN
Changable amount of scanned numbers per line (scanf)
Changable amount of scanned numbers per line (scanf)
it should still fix some issue scanf("%d ", Data[i]); waits for 1 more number because the following " " in the format directs scanf() to continue scanning until non-white space is encountered after the number.
TAG : c
Date : November 14 2020, 09:01 AM , By : eugene
Turtle drawing fractal with openGl
Turtle drawing fractal with openGl
I wish did fix the issue. This is the formula for a 2d rotation: (mUx, mUy) contains the coordinates of the "heading vector" of the turtle, then what turtleTurn(float ang) does is turning this vector by an angle (ang). If you want a nice explanation
TAG : c
Date : November 14 2020, 09:01 AM , By : wes boyett
c database program using structs
c database program using structs
should help you out void new_company(database x){You passed the object by value, so the function gets a local copy. Any changes to the object made inside the function affect only the local copy, not the original. That is your problem.
TAG : c
Date : November 14 2020, 09:01 AM , By : RaymondHealy
How to handle 3 way send() and recv() in BSD socket using C
How to handle 3 way send() and recv() in BSD socket using C
Hope that helps After sending "wrong" username - client won't start loop from beginning, actually, there is no server asks:? , server:
TAG : c
Date : November 14 2020, 09:01 AM , By : Matt

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