Questions tagged [c++]
C++ is a general-purpose programming language. Use this tag for questions about/utilizing C++. Do not also tag questions with [c] unless you have a good reason. C and C++ are different languages. Use a versioned tag such as [c++11], [c++20] etc. for questions specific to a standard revision.
103
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Synchronize three Threads in C++ one after the other
This is in continuation to this really nice one: https://stackoverflow.com/a/33500554/22598822. That post was for the sequence (t1 & t2) --> t3. Let's say I have a program running, and there ...
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1
answer
38
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explicit deleted constructors - does this matter?
When marking a constructor as deleted, i.e.
class MyClass {
// ...
MyClass(int x) = delete;
// ...
};
is there any effect to marking the deleted constructor as explicit? i.e.
...
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25
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What does "+ +" (with space between + operators) do in C++? [duplicate]
The following code:
float a = 1.5;
float b = a + + 1.2;
compiles and actually returns 2.7 for b. Why does it compile, shouldn't the extraneous + be flagged as a syntax error?
It compiles on several ...
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13
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How do I create CRUD in C++ and connect it to a database. A sample code or link to specific Youtube tutorial will be helpful. Thank you [closed]
I do not how to Create, Read, Update, and Delete database in C++
I tried to install mysql on my computer and I cannot connect it.
My laptop's operating system is windows. I am finding it difficult to ...
-11
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0
answers
53
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EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x00007ff8ed191184, pid=51412, tid=0x0000000000009a34 [closed]
I am writing protection for the maincraft cheat in the form of a native and when I added lazy importer I started having such errors
# A fatal error has been detected by the Java Runtime Environment:
#
...
-2
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0
answers
14
views
Qt6 QSGTexture not shown inside QQuickItem using custom shader classes
I try to show a simple texture through opengl and Qt6 using custom shader classes.
I created a QQuickItem which uses the updatePaintNode override to apply the QSGTexture to the custom Shader.
When I ...
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51
views
Chinese character turns into �� or @@ or just nothing [closed]
For example:
In run and debug:
In terminal:
When I input any Chinese, the debugging interface will show that the value of str1 is �� or @@ or just nothing, and it's a little unstable (but � is ...
1
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0
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24
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How do I create a User Customizable popup menu from an existing CMenu?
I use MFCs CMenu to create right-click popup menus for many user commands (C++ using VS 2022). Is there already a framework for allowing user customization of these popup menus? Meaning the user will ...
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-1
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1
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26
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getting "expression list treated as compound expression in functional cast" CE, but everything looks just fine
I tried building this:
whole code (unordered_map.h): https://pastebin.com/u9aMaqRp
test: https://pastebin.com/KqrKwNt0
and got a CE out of nowhere...?
getting a strange compilation error while ...
-1
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0
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47
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my code is showing wrong output in VS Code what should I do?
My code is showing wrong output in VS Code of my system whereas in online compiler and VS Code of other system it is working correctly how can i fix this issue.
Here is the code below
#include <...
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0
answers
8
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Create nvblox depth image from sensor message pointcloud2
I have a rosbag2 with sensor_msgs/msg/PointCloud2 messages.
I am using Nvblox.
First I would like to ask if there is any way to create a depth image from the point cloud data.
Second I would like to ...
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0
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57
views
Update: convert Delphi code to C++ in 2025 [closed]
I know this question has already been asked : old discussion on SO about 15 years ago. What would be the answer today in the presence of many LLM options like ChatGPT, Copilot etc...
Can they ...
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10
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Using GDALWarp to combine and crop HGT files
I'm trying to take a bounding box, and crop only that section from whatever source amount of HGT files are needed. I see it should be possible from this. Using GDALWarp with the following results in ...
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0
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21
views
Getting values from xml string with pugi [closed]
I have the following xml :
<Ingredients attribute="true">
<Banana id="23" val="1" />
<Flour val="0.96" />
<Apple id="...
- 165
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41
views
Coroutine awaited in parameter list breaks another parameter?
I've got the following code
https://godbolt.org/z/nehcPdxGe
#include <boost/asio.hpp>
#include <boost/asio/awaitable.hpp>
#include <boost/asio/co_spawn.hpp>
#include <gtest/gtest....
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