Recent questions tagged C

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c - Blocking recv doesn't exit when closing socket from another thread?

In Linux if we call blocking recv from one thread and close for the same socket from another thread, recv doesn't exit. Why? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - How to access my 9-data bit serial port on a PC?

I have developed an embedded solution which communicates over a Multi Drop Bus and now I would like to develop a ... port card. Can anyone help? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Equality comparison of pointers to different objects

Inspired by this answering this question, I dug a little into the C11 and C99 standards for the use of ... technique as comparing integers). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - yosemite svn 1.6.6 segmentation fault

svn stopped working in my Mac after upgrade to Yosemite. I know there is a very similar question with no answer, ... , current version 8.0.0) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - signed NaN values

Based on "IEEE" spec : "When either an input or result is NaN, this standard does not interpret the sign of a ... -1.0f) prints -nan Thank you See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Initializing a dynamically-sized Variable-Length Array (VLA) to 0

The following line of code, which creates a variable-length array on the stack: char name[length] = {''}; ... 0, sizeof(name)); Instead? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Aliasing of multi-dimensional arrays

It is well known that a 2D array is an array of arrays, and that it is required by standard to be a contiguously ... ? if yes, is (2) valid? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - raw socket listener

This is a quick question for linux c programming raw sockets. If I wanted to just listen to any interface with a ... programs that don't use it. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - How to eliminate the "discard qualifier" warning?

Using GCC and C99 mode, I have a function declared as: void func(float *X); When I call the function, I ... a pragma (or something equivalent)? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Is the crypt() function declared in unistd.h or crypt.h?

I'm using GCC 4.6.0 (on an otherwise unidentified platform). I am using the crypt() function to encrypt a ... t say that in the man page? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - How to set terminal background color on linux terminal without using ncurses?

I've wrote a simple console program in C which uses ANSI escape codes to color its text. Is there a way to ... 'd prefer to avoid using ncurses. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Pointer to current function

Is there any way to get a pointer to the current function, maybe through gcc extensions or some other trickery? ... curious if it is possible. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Socket programming: sendto always fails with errno 22 (EINVAL)

I am always getting no bytes sent, with an errno of 22 (EINVAL, Invalid Argument) with this code. The ... sending: %i ",errno); } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - dos.h for Linux?

I have a C program which contains #include <dos.h> header. It shows a compile time error. I know that the dos ... header for dos.h in Linux? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - What is "near-initialization"?

In C, what does a "near-initialization" error mean? For instance, the following will generate the error: ... this example generate the error? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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722 views

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c - weird output when I use pthread and printf

I write a program using pthread. Environment:windows 7 , CYGWIN_NT-6.1 i686 Cygwin , gcc (GCC) 4.5.3 ... some words on the output disappeared. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - How are integer types converted implicitly?

The following code fails on a MISRA check. The concrete error message is: (MISRA-C:2004 10.1/R) The value ... " with included MISRA rules check. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - How to get return value from child process to parent?

I'm supposed to return the sum of first 12 terms of Fibonacci series from child process to parent one but instead ... } What am I doing wrong? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - How to include header file through makefile

I know that there is a flag that can be used in makefile to include a header file in all the files which are ... files. I don't remember know. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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778 views

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c - Use of struct padding

What is the use of padding struct in C? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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680 views

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c - Missing AVX-512 intrinsics for masks?

Intel's intrinsics guide lists a number of intrinsics for the AVX-512 K* mask instructions, but there seem ... resorting to inline assembly? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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613 views

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c - Where does the word "dereferencing" come from?

This question will draw information from the draft N1570, so C11 basically. Colloquially, to dereference a pointer means to ... to §6.5.2.1) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Any compiler which takes 'char' as 'unsigned' ?

Is there any C compiler which takes the default type of char as unsigned unless explicitly mentioned by the user ... or project settings? /Kanu_ See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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918 views

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c - pthread_mutex_lock returns invalid argument

I am working on some C code and am having a problem with locking a mutex. The code does a call to a ... thanks for any help you can provide. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Static linking to lib and still requesting DLL

Using visual studio 2008, I have an .H and a .LIB file of a library. I wrote a program and referenced ... are statically linked to my program? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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710 views

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c - How to check if a int var contains a specific number

How to check if a int var contains a specific number I cant find a solution for this. For example: i need ... somewhere. Thanks for your help ;) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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884 views

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c - How can I convert a VSTS .lib to a MinGW .a?

I have a static library compiled with Visual Studio and I want to link to it from MinGW. I tried changing ... Any help is greatly appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Implementing logical right shift using only "~ & ^ | + << >> =" operators and 20 operations

So I have an assignment that I have to code a function in c that uses only the bitwise operations of ~ , & ... what should I consider and why? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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