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
448
views
1
answer
c++ - How to set non-selectable default text on QComboBox?
Using a regular QComboBox populated with items, if currentIndex is set to -1, the widget is empty. It ... any previous questions with answers. See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
199
views
1
answer
c++ - How to find the width of a String (in pixels) in WIN32
Can you measure the width of a string more exactly in WIN32 than using the GetTextMetrics function and using tmAveCharWidth*strSize? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
129
views
1
answer
c++ - Vector vs string
What is the fundamental difference, if any, between a C++ std::vector and std::basic_string? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
389
views
1
answer
c++ - boost::variant - why is "const char*" converted to "bool"?
I have declared a boost::variant which accepts three types: string, bool and int. The following code is showing ... to string a higher priority? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
178
views
1
answer
c++ - Passing int&& to f(int&&)
What is exactly happening here? Why is this an error? void f(int &&); int && i = 5; f(i); Isn ... is not an rvalue reference after declaration? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
210
views
1
answer
c++ - how to reuse stringstream
These threads do NOT answer me: resetting a stringstream How do you clear a stringstream variable? std:: ... szLine); szBuffer>>szKeyWord; See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
141
views
1
answer
c++ - Can 32 bit and 64 bit work together?
Can 64 bit library work in a 32 bit application? For example, my application GUI uses 32 bit Qt. And my ... they work together and how? Thanks. See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
309
views
1
answer
c++ - "g++" is not recognized as an internal or external command, MinGW
On my computer I have Windows 7 x86. I installed MinGW, I wrote the path but when I go in cmd.exe and write ... (I saw it must be installed). See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
292
views
1
answer
c++ - Engineered bool compares equal to both true and false, why?
The example bellows compiles, but the output is rather strange : #include <iostream> #include <cstring> struct A { int a; ... am using g++ 4.3.0 See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
226
views
1
answer
c++ - Partial specialization of a method in a templated class
Given: struct A { virtual bool what() = 0; }; template<typename T, typename Q> struct B : public A { ... on a user defined type, not float. See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
327
views
1
answer
c++ - Is there a way to check if an istream was opened in binary mode?
I'm using an istream which could be stringstream, ifstream or a user-defined stream type and I need to know ... stream was opened in text mode? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
189
views
1
answer
c++ - Calling a const function from a non-const object
I need to call a const function from a non-const object. See example struct IProcess { virtual bool doSomeWork() ... time. Please keep on topic. See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
784
views
1
answer
c++ - Build project with "experimental/filesystem" using cmake
I need to add a "experimental/filesystem" header to my project #include <experimental/filesystem> int main() { auto ... .a Where is my mistake? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
151
views
1
answer
c++ - const T{}; works, const T; fails when T is a non-POD,
To start with, I have a struct with one value with a default value struct S { int a = 1; }; This type can ... type is not a POD or an aggregate? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
208
views
1
answer
c++ - How to increase error limit in Visual Studio?
When building an application in Visual Studio. It shows the following error when exceeding the error count fatal ... increase the error limit? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
207
views
1
answer
c++ - Why can't I increment a variable of an enumerated type?
I have a enumerated type StackID, and I am using the enumeration to refer to an index of a particular vector ... want to link to this question. See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
997
views
1
answer
c++ - Undefined reference error for static constexpr member
Consider this code: #include <vector> struct A { static constexpr int kDefaultValue = -1; std::vector<int> v; A ... another way to make it link? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
198
views
1
answer
c++ - Is there any technical reason why std::lower_bound is not specialized for red-black tree iterators?
I have always assumed that std::lower_bound() runs in logarithmic time if I pass a pair of red-black tree ... and accepting Yakk's answer. See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
271
views
1
answer
c++ - How to get the current time zone?
In most of the examples I had seen: time_zone_ptr zone( new posix_time_zone("MST-07") ); But I just want to ... hard code the time zone name. See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
205
views
1
answer
c++ - Difference between regex_match and regex_search?
I was experimenting with regular expression in trying to make an answer to this question, and found that while regex_match ... in GCC 4.7.1? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
253
views
1
answer
c++ - Performance 32 bit vs. 64 bit arithmetic
Are native 64 bit integer arithmetic instructions slower than their 32 bit counter parts (on x86_64 machine with 64 bit ... Duo, i5/i7 etc. See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
255
views
1
answer
c++ - Proper way (move semantics) to return a std::vector from function calling in C++11
I want to fill std::vector (or some other STL container): class Foo { public: Foo(int _n, const ... redundant copying and constructor calls? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
277
views
1
answer
c++ - Could not load Spatialite extension in qSqlite ( QT 5.9)
I am trying to load Spatialite as extension in qSqlite ( Qt 5.9), I have done that before with Qt4.8, ... about this problem? Thanks in advance. See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
180
views
1
answer
c++ - Loop every 10 second
How to load a loop every 10 second and add +1 to the count and print it? like: int count; while(true) { ... know how, please help me out guys See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
290
views
1
answer
c++ - Simulating key press with PostMessage only works in some applications?
My approach to this problem turned out to be correct only in several programs. Why it isn't universal? Works ... this, nothing has changed. See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
157
views
1
answer
c++ - Using boost parse datetime string: With single digit hour format
I am working on code which needs to compile on NDK toolchain. Unfortunately, latest version only supports till ... help will be appreciated. See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
173
views
1
answer
c++ - How to stop TensorFlow from multi-threading
I am writing code for NIST FRVT. NIST wants the program to run at max 2 threads(Only CPU, No GPU). I am using TensorFlow ... .8.5 g++ -std=c++11 See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
0
votes
146
views
1
answer
c++ - Static and global variable in memory
Are static variables stored on the stack itself similar to globals? If so, how are they protected to ... multi process/ thread enviornment? See Question&Answers more detail:os...
asked
Oct 17, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
c++
Page:
« prev
1
...
237
238
239
240
241
242
243
244
245
246
247
...
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] Event: beforeunload时间太长是怎么回事?
[2] haskell - Using the "constraints" package to make a wrapped function less polymorphic
[3] python 3.x - Raspberry Pi, and linux systemd, and .system files
[4] Ruby claims " " isn't actually a space?
[5] Flutter provider, question around Dart syntax
[6] 在vue3中使用swiper,如何实现上一页下一页或者跳转到指定页面的功能?
[7] visual studio - VS 2019 ClickOnce Publish Options Error - An item with the same key has already been added
[8] DolphinDB中如何查询自己或者他人定义的函数
[9] Scraping data from XML with python
[10] js 能监听一段代码吗?使代码报错能准确输出
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
...