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
355
views
1
answer
c++ - Why does in_avail() output zero even if the stream has some char?
#include <iostream> int main( ) { using namespace std; cout << cin.rdbuf()->in_avail() << endl; cin.putback(1) ... 12; it still outputs 0 and 0 See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
200
views
1
answer
c++ - How to use fgets if you don't know the number of characters to be read?
I need to read a file and send the text from it to a string so I can parse it. However, the program won't ... *str, size_t num, FILE *stream); See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
372
views
1
answer
c++ - how to find which process has a handle on a file from the file name
Is there anything in the Windows c++ API to give me a list of processes that have a handle to a given file? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
329
views
1
answer
c++ - Density of floating point number - Magnitude of the number
Is it true that the more the floating point number is big (either positive or negative) the less we have ... values between this two ranges? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
213
views
1
answer
c++ - Mismatch of 'this' address when base class is not polymorphic but derived is
There is this code: #include <iostream> class Base { public: Base() { std::cout << "Base: " << this ... is not polymorphic and Derived class is? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
640
views
1
answer
c++ - Passing std::array as arguments of template variadic function
I am trying to learn about variadic templates in C++11. I have a class which is basically a wrapper around a ... and pass in a lambda directly? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
307
views
1
answer
c++ - Why does std::move take a forward reference?
The implementation of std::move basically looks like this: template<typename T> typename std::remove_reference<T>: ... both lvalues and rvalues? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
239
views
1
answer
c++ - How much performance difference when using string vs char array?
I have the following code: char fname[255] = {0} snprintf(fname, 255, "%s_test_no.%d.txt", baseLocation, i); ... any better way to do this? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
637
views
1
answer
c++ - How to detect global key sequence press in Qt?
I want to detect whether a key sequence is pressed and want to perform certain task on that event in Qt. ... hidden. How to solve this? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
268
views
1
answer
c++ - Is the order of initialization guaranteed by the standard?
In the following code snippet d1's initializer is passed d2 which has not been constructed yet (correct?), ... initialization of data members? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
288
views
1
answer
c++ - How would you transpose a binary matrix?
I have binary matrices in C++ that I repesent with a vector of 8-bit values. For example, the following ... that can only handle certain sizes. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
169
views
1
answer
c++ - Example of increasing the work per thread in CUDA
Algorithm : I'm writing a program with CUDA and the problem is the following: Two matrices A (n * 128) and ... GTX 650 (compute capability 3.0) See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
233
views
1
answer
c++ - Copy Constructor Needed with temp object
The following code only works when the copy constructor is available. When I add print statements (via std::cout) and make ... call to N::N(N)' See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
320
views
1
answer
c++ - Can objects with private copy constructors be thrown?
I've come across some exceptions issue that is unclear to me. In C++, when an object is thrown it is first ... return 0; } Is this legal? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
346
views
1
answer
c++ - Debug through libstdc++
I'm using gcc on GNU/Linux and the debug-files and headers of libc and libstd++ are installed. But I don' ... .h in the completely wrong place? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
213
views
1
answer
c++ - Are compilers allowed to optimize-out exception throws?
We have been discussing this topic today at work, and none of us could come up with a definitive answer ... construction has no side effect) See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
245
views
1
answer
c++ - Pretty-print types and class template along with all its template arguments
Since typeid(T).name() doesn't return human understandable name of the type, it doesn't help us much ... template and its arguments generically? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
343
views
1
answer
c++ - How do you check for an invalid pointer?
My current code to the effect of: if( objectPointer != NULL){ delete objectPointer; } doesn't work because the ... trying to delete the object? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
270
views
1
answer
c++ - redirect output of an function printing to console to string
lets say we have a function which prints text to the console and in which we do not have control over the ... way to do this via terminal See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
234
views
1
answer
c++ - More than 1 address for derived class object?
In Item 27 of "Effective C++" (3rd Edition, Page 118), Scott Meyers said: class Base { ... }; class ... is implemented in the C++ compiler? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
313
views
1
answer
c++ - RANSAC-like implementation for arbitrary 2D sets
TL;DR : Is there a C++ implementation of RANSAC or other robust correspondence algorithms that is freely usable with ... that I have missed... See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
445
views
1
answer
c++ - Lifetime of rvalue reference
I think I have a problem with understanding rvalue references. What is really the lifetime and usage of such ... the new lifetime of object? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
378
views
1
answer
c++ - Do parentheses force order of evaluation and make an undefined expression defined?
I was just going though my text book when I came across this question What would be the value of a after the ... clear answer will get my vote See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
187
views
1
answer
c++ - Design Pattern, Qt Model/View and multiple threads
I am creating an application which displays the market data and uses it in some other forms too. I store ... /ill-formed questions. Thanks Shiv See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
293
views
1
answer
c++ - "Avoid returning handles to object internals", so what's the alternative?
Effective C++ by Scott Meyers tells in Chapter 5, Item 28 to avoid returning "handles" (pointers, references or ... do you handle such cases? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
330
views
1
answer
c++ - Output difference in gcc and turbo C
Why is there a difference in the output produced when the code is compiled using the two compilers gcc and turbo c ... " on turbo c. Why? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
1.3k
views
1
answer
c++ - Error: pure virtual method called - terminate called without an active exception - Aborted
In my A.h file: class A{ private: unsigned short PC; public: A():PC(0){} virtual ~A(){} ... anybody where did I misunderstand? Thank you See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
282
views
1
answer
c++ - Is it possible to use boost accumulators with vectors?
I wanted to use boost accumulators to calculate statistics of a variable that is a vector. Is there a simple way to do ... I'm a bit dumb. :P See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
Page:
« prev
1
...
63
64
65
66
67
68
69
70
71
72
73
...
568
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] el-tree 不设置复选框怎么设置禁用其中某项??
[2] swift - Change WebView url from AppDelegate
[3] Angular devui 表格组件中自定义模板的使用
[4] redis cluster连接问题
[5] vue H5应用js内存占用120M是什么概念。
[6] react 函数组件可以实现继承类似的效果吗?
[7] python - How to create a polygon and check if given lat, lon are inside
[8] oauth2 密码模式下client_secret明文传输会不会不安全?
[9] mysql 有间隔符的字符串查询的问题
[10] vue两个项目合并 怎么设置不同入口和打包路径
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
...