Recent questions tagged C++

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c++ - Optimize template replacement of a switch

I have a lot of custom datatypes in one of my projects which all share a common base class. My data (coming from a ... ++14 and stick to C++03. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Differences between running an executable with Visual Studio debugger vs without debugger

I'm trying to debug an issue in which an executable produces repeatable output (which I want) when executed ... mode with the debug heap! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - llvm ir back to human-readable source language?

Is there an easy way of going from llvm ir to working source code? Specifically, I'd like to ... doing the machine-dependent optimisations. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Is it possible to set a gdb watchpoint programmatically?

I want to set a watchpoint (break on hardware write) temporarily in my C++ program to find memory corruption ... break on hardware write %addr") See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - How can it be useful to overload the "function call" operator?

I recently discovered that in C++ you can overload the "function call" operator, in a strange way in which you ... a(); When is this useful? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - How does an extern "C" declaration work?

I'm taking a programming languages course and we're talking about the extern "C" declaration. How does this ... in the program as well? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - In CMake, how do I work around the Debug and Release directories Visual Studio 2010 tries to add?

I'm trying to build one of my CMake-based projects from a couple of years ago with Visual Studio 2010 and I'm ... 2.8.6 and Visual Studio 2010? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - How to configure CDB in Qt Creator?

The question here is the same as mine but the solution there is not working for me. I am using ... -project.org/forums/viewthread/16018/ See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - What does "typedef void (*Something)()" mean

I am trying to understand what this means, the code I am looking at has in .h typedef void (*MCB)(); static ... ? I hope my questions are clear. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - How to format date time object with format dd/mm/yyyy?

How could I print the current date, using Boost libraries, in the format dd/mm/yyyy H? What I have: boost:: ... want: 14-Dec-2009 23:31:40 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - what is the performance impact of using int64_t instead of int32_t on 32-bit systems?

Our C++ library currently uses time_t for storing time values. I'm beginning to need sub-second precision in some ... CC, Windows + MSVC). See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - reinterpret_cast between char* and std::uint8_t* - safe?

Now we all sometimes have to work with binary data. In C++ we work with sequences of bytes, and since the beginning ... in §3.10/10. What now? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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217 views

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c++ - Clang-format line breaks

I'm looking for a clang-format setting to prevent the tool from removing line breaks. For example, I have my ... the docs stood out to me. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Mixing extern and const

Can I mix extern and const, as extern const? If yes, does the const qualifier impose it's reign only within the ... not a const and vice versa? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ overloaded virtual function warning by clang?

clang emits a warning when compiling the following code: struct Base { virtual void * get(char* e); // virtual ... behavior with Xcode 4.6.3. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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257 views

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c++ - Why is std::is_pod deprecated in C++20?

std::is_pod will be probably deprecated in C++20. What's the reason for this choice? What should I use in place ... if a type is actually a POD? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - A simple hello world NPAPI plugin for Google Chrome?

I am trying to make a chrome plugin but Chrome API doesn't give me enough power. I want to use NPAPI but ... application so I can get started? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - taking input of a string word by word

I just started learning C++. I was just playing around with it and came across a problem which involved taking ... writing it again and again? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Why is arr and &arr the same?

I have been programming c/c++ for many years, but todays accidental discovery made me somewhat curious... Why does both ... i, but &arr2 != arr. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Where in memory is vtable stored?

Where in memory is vtable stored? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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188 views

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c++ - counting the number of lines in a text file

I'm reading lines off of text file and I'm wondering if this is a good way to go? I had to write the ... Is there any other easier better way? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Maximum number of parameters in function declaration

I know that minimum number of parameters in function definition is zero, but what is the maximum number of ... to write a real function. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Cannot get OpenCV to compile because of undefined references?

The code is simple and is essentially straight from this tutorial. I am running Arch Linux and have the ... /vendor_perl:/usr/bin/core_perl] See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Get memory address of member function?

How do I get the absolute address of a member function in C++? (I need this for thunking.) Member function ... the address relative to the type. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - How do shared pointers work?

How do shared pointers know how many pointers point to that object? (shared_ptr, in this case) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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369 views

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c++ - How do memory_order_seq_cst and memory_order_acq_rel differ?

Stores are release operations and loads are acquire operations for both. I know that memory_order_seq_cst is meant ... the relaxed model? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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140 views

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c++ - How can I use a C++11 to program the Arduino?

How can I use C++11 when programming the Arduino? I would be fine using either the Arduino IDE or ... that require standard library changes. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Purpose of a ".f" appended to a number?

I saw 1/3.f in a program and wondered what the .f was for. So tried my own program: #include < ... read more about this interesting syntax? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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