Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Login
Remember
Register
Ask
Q&A
All Activity
Hot!
Unanswered
Tags
Users
Ask a Question
Ask a Question
Categories
All categories
Topic[话题] (13)
Life[生活] (4)
Technique[技术] (2.1m)
Idea[创意] (3)
Jobs[工作] (2)
Others[杂七杂八] (18)
Code Example[编程示例] (0)
Recent questions tagged C
0
votes
328
views
1
answer
c - If free() knows the length of my array, why can't I ask for it in my own code?
I know that it's a common convention to pass the length of dynamically allocated arrays to functions that ... har-har) knowledge from? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
456
views
1
answer
c - Is it guaranteed to be safe to perform memcpy(0,0,0)?
I am not so well-versed in the C standard, so please bear with me. I would like to know if it is ... that the memory regions overlap here ? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
568
views
1
answer
c - dynamic allocation/deallocation of 2D & 3D arrays
I know about algorithms to allocate/deallocate a 2D array dynamically, however I'm not too sure about the same for 3D ... ]); } free(arr3D); } See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
283
views
1
answer
c - MPI_Type_create_subarray and MPI_Gather
I have to solve a little mpi problem. I have 4 slaves processes and each of these wants to send a 2d subarray ( ... MPI. return 0; } Thanks all. See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
429
views
1
answer
c - How does srand relate to rand function?
I understand that rand() function generates the same number(s) each you run it if you don't change the ... srand is called first before rand? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
533
views
1
answer
c - bind socket to network interface
How can I bind a socket to a particular network interface? I tried using setsockopt on server side, but the ... mentioning the IP address). See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
315
views
1
answer
c - What does request_mem_region() actually do and when it is needed?
I'm studying on writing embedded linux driver, and decided to fire a few GPIOs to make sure I understand the ... ()? Thanks for any replies! See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
267
views
1
answer
c - What is the real difference between Pointers and References?
AKA - What's this obsession with pointers? Having only really used modern, object oriented languages like ActionScript ... missing out on here? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
487
views
1
answer
c - How do *nix pseudo-terminals work ? What's the master/slave channel?
I want to write a simple, dumb, X terminal emulator in C on a Linux system. At first, I just thought I would ... } close(master); return 0; } See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
981
views
1
answer
c - How to make gcc link strong symbol in static library to overwrite weak symbol?
My problem can be summarised in the following: bar.c: #include <stdio.h> void bar() { printf("bar "); ... the weak symbol in main.c? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
295
views
1
answer
c - Query on -ffunction-section & -fdata-sections options of gcc
The below mentioned in the GCC Page for the function sections and data sections options: -ffunction-sections -fdata ... Am I missing something? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
701
views
1
answer
c - How to flush the CPU cache for a region of address space in Linux?
I am interested in flushing cache (L1, L2, and L3) only for a region of address space, for example all ... either from user or kernel space? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
801
views
1
answer
c - How to resolve the "EVP_DecryptFInal_ex: bad decrypt" during file decryption
I have the following query.Could any one please suggest me a solution. I'm working on encryption and decryption of ... return 0; } Thank you. See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
480
views
1
answer
c - How do realloc and memcpy work?
I have two questions. Do realloc() and memcpy() copy the entries in an array to another in a way faster ... decreasing the size of the array ? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
467
views
1
answer
c - Can I do a copy-on-write memcpy in Linux?
I have some code where I frequently copy a large block of memory, often after making only very small changes to ... it and doing it myself. See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
371
views
1
answer
c - Where can I find system call source code?
In Linux where can I find the source code for all system calls given that I have the source tree? ... type in terminal like my_system_call? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
495
views
1
answer
c - Difference between scanf() and fgets()
I want to know what is the difference between fgets() and scanf(). I am using C as my platform. See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
612
views
1
answer
c - getopt does not parse optional arguments to parameters
In C, getopt_long does not parse the optional arguments to command line parameters parameters. When I run the program, the ... } } return 0; } See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
395
views
1
answer
c - How can I get the keyboard state in Linux?
I want to check if the user pressed down the Shift key when the program starts. (That means, press ... with accessing the terminal directly. See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
467
views
1
answer
c - size of a datatype without using sizeof
I have a data type, say X, and I want to know its size without declaring a variable or pointer of that ... work with user defined data type. See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
397
views
1
answer
c - What exactly does fork return?
On success, the PID of the child process is returned in the parent's thread of execution, and a 0 is returned in the ... is p equal to 0 or PID? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
971
views
1
answer
c - UDP Socket Set Timeout
I am trying to set a 100ms timeout on a UDP Socket. I am using C. I have posted relavent pieces of my code ... %d ", seq_num); num_timeouts++; } See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
513
views
1
answer
c - Can you bind() and connect() both ends of a UDP connection
I'm writing a point-to-point message queue system, and it has to be able to operate over UDP. I could ... nicely symmetric way to do it. See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
521
views
1
answer
c - Check if process exists given its pid
Given the pid of a Linux process, I want to check, from a C program, if the process is still running. See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
591
views
1
answer
c - What's sizeof(size_t) on 32-bit vs the various 64-bit data models?
On a 64-bit system, sizeof(unsigned long) depends on the data model implemented by the system, for example, ... 64-bit data models on Wikipedia See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
475
views
1
answer
c - Using realloc to shrink the allocated memory
Simple question about the realloc function in C: If I use realloc to shrink the memory block that a pointer is ... Will I have a memory leak? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
288
views
1
answer
c preprocessor - C++ #include semantics
This is a multiple question for the same pre-processing instruction. 1 - <> or "" ? Apart from the info found ... ) and what are the pros/cons? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
0
votes
514
views
1
answer
c - Dereferencing type-punned pointer will break strict-aliasing rules
I used the following piece of code to read data from files as part of a larger program. double data_read( ... example with the real function. See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c
Page:
« prev
1
...
105
106
107
108
109
110
111
112
113
114
115
...
208
next »
Ask a question:
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question
Just Browsing Browsing
[1] 哥哥们,在vs code中,如何不让TypeScript检测非ts的文件?
[2] php - how to configure apache 2.4 and laravel 8 in debian 10(buster)
[3] javascript - Dropzone.js not sending the file when adding additional data
[4] node.js - "Uncaught (in promise) ReferenceError: process is not defined" when migrating to Parcel 2
[5] script标签修改了type为text/babel,但刷新网页还是显示text/javascript
[6] 二维数据聚合求最大值,用JavaScript或者Java怎么实现啊?
[7] react-router-dom 多个switch互相跳转,匹配不到页面
[8] conditional count of items row wise in SQL Oracle
[9] Can I get the property of a specific object in a Django template?
[10] lodash的basexor疑惑
2.1m
questions
2.1m
answers
60
comments
56.9k
users
Most popular tags
javascript
python
c#
java
How
android
c++
php
ios
html
sql
r
c
node.js
.net
iphone
asp.net
css
reactjs
jquery
ruby
What
Android
objective
mysql
linux
Is
git
Python
windows
Why
regex
angular
swift
amazon
excel
algorithm
macos
Java
visual
how
bash
Can
multithreading
PHP
Using
scala
angularjs
typescript
apache
spring
performance
postgresql
database
flutter
json
rust
arrays
C#
dart
vba
django
wpf
xml
vue.js
In
go
Get
google
jQuery
xcode
jsf
http
Google
mongodb
string
shell
oop
powershell
SQL
C++
security
assembly
docker
Javascript
Android:
Does
haskell
Convert
azure
debugging
delphi
vb.net
Spring
datetime
pandas
oracle
math
Django
联盟问答网站-Union QA website
Xstack问答社区
生活宝问答社区
OverStack问答社区
Ostack问答社区
在这了问答社区
在哪了问答社区
Xstack问答社区
无极谷问答社区
TouSu问答社区
SQlite问答社区
Qi-U问答社区
MLink问答社区
Jonic问答社区
Jike问答社区
16892问答社区
Vigges问答社区
55276问答社区
OGeek问答社区
深圳家问答社区
深圳家问答社区
深圳家问答社区
Vigges问答社区
Vigges问答社区
在这了问答社区
DevDocs API Documentations
Xstack问答社区
生活宝问答社区
OverStack问答社区
Ostack问答社区
在这了问答社区
在哪了问答社区
Xstack问答社区
无极谷问答社区
TouSu问答社区
SQlite问答社区
Qi-U问答社区
MLink问答社区
Jonic问答社区
Jike问答社区
16892问答社区
Vigges问答社区
55276问答社区
OGeek问答社区
深圳家问答社区
深圳家问答社区
深圳家问答社区
Vigges问答社区
Vigges问答社区
在这了问答社区
在这了问答社区
DevDocs API Documentations
Xstack问答社区
生活宝问答社区
OverStack问答社区
Ostack问答社区
在这了问答社区
在哪了问答社区
Xstack问答社区
无极谷问答社区
TouSu问答社区
SQlite问答社区
Qi-U问答社区
MLink问答社区
Jonic问答社区
Jike问答社区
16892问答社区
Vigges问答社区
55276问答社区
OGeek问答社区
深圳家问答社区
深圳家问答社区
深圳家问答社区
Vigges问答社区
Vigges问答社区
在这了问答社区
DevDocs API Documentations
广告位招租
...