Recent questions tagged C++

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c++ - Is Visual Studio buggy in printing the function address?

Take the following testcase: #include <iostream> void foo() {} int main() { std::cout << &foo << ... is the non-conformance documented anywhere? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - MPI-3 Shared Memory for Array Struct

I have a simple C++ struct that basically wraps a standard C array: struct MyArray { T* data; int length; // ... two arrays I'd like to share. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Link static library in another static library

I need to link the Abaqus ODB C++ API static library in another static library. I can get this to " ... link both of dependent static libraries. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Why does insert invalidate the std::set reverse iterator

My understanding is the iterators of associative containers are not invalidated during insert or erase (unless the node ... here 14 ===== See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - How do I compile a .cpp source file into a .dll?

How do I compile a .cpp source file into a .dll? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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575 views

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c++ - Why max (max(a,b), c) is error

Reference: code snippet from C++ Template: The Complete Guide // maximum of two values of any type (call-by- ... still valid. Is that true? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Reading formatted input from an istream

The problem below has been simplified from real requirements. Consider the following program: #include <iostream> ... the minimum effort)? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - How can I deal with depressed Windows logo key when using `SendInput`?

My application synthesises keystrokes in other apps by using SendInput. This almost works, except that due to ... possible to do this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - What leads to incomplete types? (QGraphicsItem: Source or target has incomplete type)

I have a custom QGraphicsItem, that (among other things) changed the cursor to an open hand when clicked, using ... Thanks for your time, Louise See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - extern storage class specifier

Section 7.1 of the C++ Standard mentions about 'extern' as a storage class specifier. N3126 - "The ... why this redundancy? C Compatibility? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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782 views

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c++ - OpenMP/__gnu_parallel for an unordered_map

At some point in my code I have to make operations on all elements in an unordered_map. In order to ... looking forward to your answers. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - How to set the Windows taskbar icon during runtime?

normally the icon that belongs to a application's taskbar-button is the same icon that is contained in the EXE ... !) during runtime? Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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840 views

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c++ - Qt create Link between folders

I have to build a small dialog that creates a symbolic link to a folder. In windows I would use ... Any suggestions? Best regards, Richard See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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586 views

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c++ - Adding a binary file to resource in Visual Studio

Please this might sound newbie - ish but I just couldn't get it to work since... What is the steps to ... know how to add the RC_BINARYTYPE part See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - how to create menu in statusbar in qt like PC start menu

In my qt application, i have designed status bar with few icons. On the left of my status bar i have added ... menu on click of menu button See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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688 views

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c++ - Replace char in string with some string inplace

i want to replace a character in the string with a string. can i do it in-place? As the new string has ... once it was initilized like c++ See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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559 views

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c++ - Boost.Spirit SQL grammar/lexer failure

I have two problems with the following SQL grammar: #define BOOST_SPIRIT_QI_DEBUG #include <boost/spirit/include/qi.hpp> ... is wrong? Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - What's the most efficient way to read a file into a std::string?

I currently do this, and the conversion to std::string at the end take 98% of the execution time. There must be a ... ,buf.end()); return s; } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Why do successive calls to new[] not allocate contiguous memory?

I am using Ubuntu 14.04 64-bit. Here is my C++ code to see how memory is used. int main() { ... - 0x119502F, 0x1195038 - 0x0x119504F for? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Can I pass a pointer to a superclass, but create a copy of the child?

I have a function that takes a pointer to a superclass and performs operations on it. However, at some point ... offers a more elegant solution. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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678 views

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c++ - Cast member function for create_pthread() call

I want to stop the warning server.cpp:823: warning: converting from 'void* (ClientHandler::)()' to ... exactly? Something completely different? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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601 views

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c++ - constructors basic (reference to distance is ambiguous)

I was practicing constructors. Below is the code which I was practicing but got an error that "reference to distance is ... c,m); return 0; } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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693 views

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c++ - stl list - complexity

Are all the inserts (anywhere) for the list constant? What about access? Front, back - constant time? and in the ... of the list - linear time? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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564 views

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c++ - different types of objects in the same vector array?

I am using an array in a simple logic simulator program and I want to switch to using a vector to learn it but ... the vector array (gate) ???? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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711 views

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c++ - static_assert of const Variable

I have this code: const float foo = 5.0F; static_assert(foo > 0.0F, "foo must be greater than 0."); But ... it's defined under the C++ standard. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.6k views

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c++ - Getline to String Copies newline as well

I am reading a file line by line and adding each line to a string. However the string length increases by 1 ... shows an increased by 1 value. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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708 views

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c++ - Read Unicode Files

I have a problem reading and using the content from unicode files. I am working on a unicode release build, ... and posts, but nothing worked. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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487 views

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c++ - Why does the object created without using "new" operator gets the same address

Going through this question, one answer said the object created are destroyed outside their scope, To get this ... allocated to each object? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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