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Can std::threads be created / destroyed from global variables in a Windows DLL?
hope this fix your issue Since you're writing a DLL in C++, you have to understand how "globals" in DLL's work. The compiler sticks their initialization in DllMain, before anything else that you would do there. But there are some strict rules what yo
TAG :cpp
Date : August 05 2020, 06:00 AM , By : monika
How to seperate a line in a txt file to components C++
To fix the issue you can do ı'm trying to read a netlist(or text) file and seperate it to words. So far I have tried the code below but I cannot get rid of errors. Any ideas? , Almost there. Initialize the stringstream with the line contents:
TAG :cpp
Date : August 05 2020, 06:00 AM , By : Joseph Henshaw
c++ the difference between string using the assign function and directly using '=' to change the value
wish of those help From cppreference
TAG :cpp
Date : August 05 2020, 06:00 AM , By : Vanessa Charles
QT add Map QML Items via C++
wish helps you That it is established that an item is a child of the map does not imply that it is shown on the map, if you want to add an item you must use the addMapItem() method and in C++ you can use QMetaObject::invokeMethod() to invoke that met
TAG :cpp
Date : August 05 2020, 05:00 AM , By : Ian Moreno
long long int don't take long int well
this will help You have here a classic example of "undefined behaviour!" The variable that is score[i] is (assuming a reasonable definition of the type ull) an unsigned long long int (possibly/probably 64-bits) but both the scanf and 'offending' prin
TAG :cpp
Date : August 05 2020, 03:00 AM , By : Jan Bauer
Can the fragile base class problem occur in C++?
fixed the issue. Will look into that further Konrad Rudolph shows that C++ has this exact same problem. I want to present here some solutionsA solution mentioned in the wiki is to make inc2 final.
TAG :cpp
Date : August 05 2020, 02:00 AM , By : Alexandre Cainelli
How do I write an array of contents into a text file?
Hope that helps The code is supposed to open an existing text file, transfer the contents into the array, then create a new text file and then write the array contents into the new text file. The problem I'm having is that the code only outputs the l
TAG :cpp
Date : August 05 2020, 01:00 AM , By : BrownEyedGirl
How to stop execution of an async function when input is recieved in C++
This might help you As @PeteBecker suggested, changing s_cinGet from bool to std::atomic gets rid of undefined behaviour. Problem solved.
TAG :cpp
Date : August 05 2020, 01:00 AM , By : Paulo Roberto Barth
Why is this code erroring when using a lambda?
I wish this help you The error is : , Consider:
TAG :cpp
Date : August 04 2020, 10:00 PM , By : Little Indian
Does std::(customization point) invoke the most appropriate overload?
around this issue A real example is std::swap, which is a designated customization point. Does this mean since C++20, we can write std::swap(a, b) directly instead of using std::swap; swap(a, b);?
TAG :cpp
Date : August 04 2020, 10:00 PM , By : Peter Korsch
Sharing a class between threads
I think the issue was by ths following , You are passing each thread a pointer to the same int variable. That variable changes value on each loop iteration. writer() is expecting to receive the same int value that was given to pthread_create(), but t
TAG :cpp
Date : August 04 2020, 10:00 PM , By : ISingBass
Stack Program in C++
hop of those help? Perform the INSERT and REMOVE operations as specified in the text file. The result is 'stack' if all remove operations are possible (do not occur when the stack is empty) and the operand of each remove operation equals the actual v
TAG :cpp
Date : August 04 2020, 09:00 PM , By : Matt Pouttu-Clarke
What is wrong with auto?
it should still fix some issue arr.size() is an unsigned data type, usually size_t. With i being unsigned, i >= 0 is always true. Subtracting 1 from an unsigned variable that is 0 results in the biggest amount that the type can hold. As a result, it
TAG :cpp
Date : August 04 2020, 08:00 PM , By : V.Viswanathan
C++ A* algorithm not always having the target node in path
I wish this help you queue.erase(queue.begin());. This is a bug. You are erasing the oldest added object, while you should pop the current shortest path node. You should also remove the shortest path node from the visited set!
TAG :cpp
Date : August 04 2020, 07:00 PM , By : SMartin
Crop an HBITMAP with C++ on Windows
fixed the issue. Will look into that further I'm not sure if this going to work or not due to I haven't been working on Win32 for a long time, so let's try.Here is the idea:
TAG :cpp
Date : August 04 2020, 05:00 PM , By : SongXing
understanding references in c++
To fix the issue you can do You don't ever change the value of ref (the language does not let you rebind a reference). In fact, this is why you need to use reference initialisation when you create a reference: you can't write int ref; ref = x; for ex
TAG :cpp
Date : August 04 2020, 05:00 PM , By : hicham ritel
Compiling standard library types
hope this fix your issue std::string has 3 versions of operator= ( C++03 ). One of them takes a single char. If you present s = 65; it takes the int as a char and calls the string operator= (char c); version. std::string creates a single character st
TAG :cpp
Date : August 04 2020, 04:00 PM , By : ganzi
Sending argument to an .exe via SHELLEXECUTEINFO
hop of those help? The lpParameters member is a pointer to a space-delimited string of arguments, just like you would pass them in a command-line environment.If you want to pass two arguments to the program, you do it like
TAG :cpp
Date : August 04 2020, 03:00 PM , By : zakaxex
Why I can't use i/10 in FOR LOOP, C++?
wish help you to fix your issue You can, although i = i / 10 can be abbreviated to the arguably clearer i /= 10.Your helpful compiler is warning you about the initialisation expression of the for, which is just i, and that is a no-op.
TAG :cpp
Date : August 04 2020, 02:00 PM , By : Deekshith Narayanam
How to use PERF_SAMPLE_READ with mmap
fixed the issue. Will look into that further I've found the bug !The problem is that the kernel don't support the use of PERF_SAMPLE_READ when the inherit member of the perf_event_attr structure is set.
TAG :cpp
Date : August 04 2020, 02:00 PM , By : DG_ZRH
Is there any way to iterate through a struct?
help you fix your problem You can use Boost Flat Reflection like:
TAG :cpp
Date : August 04 2020, 01:00 PM , By : chathura pathmasoori
My character counting code is miscounting characters. Why?
fixed the issue. Will look into that further The input file has 4 items but the program seems to be counting more items. I was trying to create a function that would count the items that were capitals within the text file. , You see inconsistent numb
TAG :cpp
Date : August 04 2020, 11:00 AM , By : Vilmar Almeida
Difference between std::resize(n) and std::shrink_to_fit in C++?
wish helps you Vectors have two "length" attributes that mean different things: size is the number of usable elements in the vector. It is the number of things you have stored. This is a conceptual length. capacity is how many elements would fit into
TAG :cpp
Date : August 04 2020, 11:00 AM , By : Danillo Moraes
Wildcard for C++ concepts saying "accepting anything for this template argument"
wish helps you You can achieve wildcard behavior by modifying the Pair concept to accept and check a tag type Any.Let's first declare Any as a tag class, no need to implement it.
TAG :cpp
Date : August 04 2020, 11:00 AM , By : sara sara
Which of the objects of the class A would be created first in this code snippet?
hope this fix your issue Objects are created in the order in which they are declared. The comma operator doesn't change that.Doing
TAG :cpp
Date : August 04 2020, 08:00 AM , By : user6110939
Floating point math accuracy, c++ vs fortran
it helps some times Although the variables in your FORTRAN function are defined as double-precision (8 bytes), the constants you have specified are default (single-precision, 4-byte) values.According to this discussion, that means the arithmetic is p
TAG :cpp
Date : August 04 2020, 08:00 AM , By : Pedro
C++ initialize objects with packed array of integers
I think the issue was by ths following , First, in your existing constructor, the char myArr[MYNUM] parameter is the same as passing char myArr[] which is the same as char *myArr. IOW, the constructor takes a simple pointer as input, so it does not a
TAG :cpp
Date : August 04 2020, 07:00 AM , By : snehitha
Picking a constructor to call
this will help Consider the following code , Starting in C++17
TAG :cpp
Date : August 04 2020, 07:00 AM , By : McGlock
using function call in constructor gives different result c++
this one helps. The order of evaluation of function arguments is unspecified; the second piece of code may evaluate parseExpressionTerm() before _currentToken.getVal(), and this is what's happening. If evaluation order matters, you need to take care
TAG :cpp
Date : August 04 2020, 05:00 AM , By : KingForm
Using strcpy to copy elements of an char array to another array
it should still fix some issue First of all why you use char * and strcpy if you tagged you question c++? Its better to use std::string to keep strings and probably std::vector or std::array for arrays. Also, you probably should consider using std::u
TAG :cpp
Date : August 04 2020, 05:00 AM , By : Zedda
Templated Constructor Specialization
I wish this help you How can one specialize a templated constructor? , You can always overload instead:
TAG :cpp
Date : August 04 2020, 04:00 AM , By : baqar hussain
Struggling to convert an integer into a linked list. Not sure what I'm doing wrong here
it fixes the issue Your code loses the head of the list because it is stored in ptr which is changed on each insertion.You can append a node to a singly-linked list in a more efficient manner:
TAG :cpp
Date : August 04 2020, 02:00 AM , By : Cody Murray
C++: Is it better to store a console output in a macro?
I hope this helps . "Better" is a really vague term, it really depends on what you are trying to achieve.Every implementation decision has its pros and cons, so it is really up to the single project.
TAG :cpp
Date : August 03 2020, 10:00 PM , By : Y.hadj.younes
C++ - Exception in Constructor
I hope this helps . I have a problem. I must throw an exception in the constructor One() but do not know how do I suppose to catch it. Can someone suggest something? I have tried this method: Throwing exceptions from constructors , What happens if a
TAG :cpp
Date : August 03 2020, 10:00 PM , By : Eden Anbinder
AVX: matrix dot vector, but ignore diagonal
I hope this helps you . If the FP rounding error isn't a problem, you can of course just subtract vec[i] * matrow[i] from that dot product, after the loop. But that fails if it results in a NaN or Inf, or a huge number that results in huge rounding e
TAG :cpp
Date : August 03 2020, 09:00 PM , By : Bill Hung
Pointer To Pointer passed by reference
I hope this helps you . Converting a comment to an answer.Don't let the "pointer" part confuse you. To pass any type T by reference, write the function to take T. For a float** that means float**.
TAG :cpp
Date : August 03 2020, 08:00 PM , By : DJenksdaCoder
Why is this operator< overload function invisible to STL algorithms?
wish of those help To be found by ADL, you have to put your operator in the same namespace as the class:
TAG :cpp
Date : August 03 2020, 07:00 PM , By : Ank
What is the correct algorithm to perform double-float division?
hope this fix your issue Reviewing the Pseudocode Algorithm as written in the book appears to support the C++ implementation of this algorithm, although my unfamiliarity with Cg means I can't prove that that implementation is correct for Cg.
TAG :cpp
Date : August 03 2020, 07:00 PM , By : Mike Cristancho
In the case of using a std::unique_ptr to automatically deallocate memory upon exiting a scoped block, why not just use
To fix this issue While this is not a terrible useful example per-se, it becomes with some slight variations. Polymorphism
TAG :cpp
Date : August 03 2020, 05:00 PM , By : Mattcoop777
C++: Iterating over a string vector and using the index for putenv
wish help you to fix your issue You're mixing C and C++ stuff. Your vector contains C++ strings, std::string. putenv is an "old" function expecting a pointer to a char buffer, i.e. a C-string.
TAG :cpp
Date : August 03 2020, 04:00 PM , By : user6111286
OpenCL Matrix Multiplication Using std::vector
around this issue I am trying to use OpenCl to preform a vector multiplication, while the code itself seems to work the result returned is either garbage or zeros. From what I can tell it appears that it either the kernel is not receiving the correct
TAG :cpp
Date : August 03 2020, 04:00 PM , By : vadim
template template parameter deduction: three different compilers three different behaviors
This might help you This is CWG 150, which was resolved by DR P0522, which is in C++17.Note that g++ rejects the program (both calls to f) in C++14 mode (-std=c++14, etc).
TAG :cpp
Date : August 03 2020, 03:00 PM , By : Zarin Miah
C++ pull a card from deck
seems to work fine Your calls to rankCard() and suitCard() always return 0.That 0 value is what's passed to cout in your main function.
TAG :cpp
Date : August 03 2020, 03:00 PM , By : Wombley Huxley
File reading with and without new line
I wish this help you The C++ library provides you with a handy getline function. Here is a minimal example from cplusplus.com
TAG :cpp
Date : August 03 2020, 01:00 PM , By : Boontje
store strings in stable memory in c++
will help you My answer from a similar question: Any way to update pointer/reference value when vector changes capability?If you store objects in your vector as std::unique_ptr or std::shared_ptr, you can get an observing pointer to the underlying ob
TAG :cpp
Date : August 03 2020, 06:00 AM , By : c_bit17
Why is static_cast used in QT's official document
fixed the issue. Will look into that further It is perfectly alright to use static_cast if you are absolutely certain that the appropriate dynamic_cast would succeed. Using static_cast is faster than dynamic_cast since it involves no runtime checks.
TAG :cpp
Date : August 03 2020, 06:00 AM , By : Julio Morris
iterator .end() from std::list returns "0xcdcdcdcdcdcdcdcd" but .begin() as expected
Does that help The iterator returned by .end() is one past the end of the collection. You should never dereference it. You should normally compare against it, and when something else compares equal to it, that other iterator is no longer valid, and c
TAG :cpp
Date : August 03 2020, 05:00 AM , By : codex
Is std::sqrt the same as sqrt in C++
seems to work fine I doesn't look like the same formula as in the A = sum(B*C)/sum(B) you're using C column which is not existent in your first formula D = (sum_B / double(E))*std::sqrt(E)As for your primary question "sqrt" is simply an acronym of "s
TAG :cpp
Date : August 03 2020, 04:00 AM , By : Merosian
Iterate through std::initializer_list
Hope that helps sum with std::initializer_list might be done the following way in C++11:
TAG :cpp
Date : August 03 2020, 03:00 AM , By : Caroline Vroom
Codeblocks c++ code doesn't run in VS 19 (vector subscript out of range)
To fix the issue you can do You're bound checking your vector accesses too late.Because of short-circuit evaluation, (distanceTraversed + tank) > stations[i] i< stations.size() doesn't work the way you think it does, 1st you access the array, and on
TAG :cpp
Date : August 03 2020, 02:00 AM , By : amm
Why erase on std::vector promote iterator
To fix this issue vector's erase function returns an iterator that references the first element after the erased elements. Use the return value by changing
TAG :cpp
Date : August 02 2020, 10:00 PM , By : kdunne
how to destroy an object in C++
Any of those help Use smart pointers to create and delete your objects. The easiest one to use is unique_ptr.Your code should like something like this:
TAG :cpp
Date : August 02 2020, 09:00 PM , By : James Larracoechea
How to create Visual Studio 2015 solution from CMake
I wish this helpful for you Visual Studio is a multi-configuration generator, so you can easily switch between Release and Debug. No need to use a CUSTOM_BUILD_TYPE argument. In addition, CMake provides generator expressions (e.g. $) for setting conf
TAG :cpp
Date : August 02 2020, 04:00 PM , By : aureliajulianna
Using concepts for checking if a type T has a field F
Hope this helps Checking if a parameter provided has a field F can be easily achieved with a requires constraint on the function itself:
TAG :cpp
Date : August 02 2020, 03:00 PM , By : Danny74
constructor giving error: no matching function for call to
Any of those help If you don't explicitly call a constructor of a base class it's default constructor will be called. But JMTDSavingsAccount has no default constructor, so you need to explicitly call it's constructor:
TAG :cpp
Date : August 02 2020, 10:00 AM , By : marciot
search top n% of a vector member C++
To fix this issue It looks like you want partial_sort. It will sort 2% of your items, and the remaining 98% will be in essentially random order.
TAG :cpp
Date : August 02 2020, 09:00 AM , By : Ophir Maor
Is this reinterpret_cast problematic in principle, and/or in practice?
fixed the issue. Will look into that further Take the following: , Does this program have undefined behaviour?
TAG :cpp
Date : August 02 2020, 08:00 AM , By : Alexander Litvinov
What is the following error doing? I do not see any error with the bounds
hop of those help? sizeof(letters) is only right if letters is a plain array of char, which it cannot be because plain arrays don't have at member function. at member functions in the C++ standard library compare with size() for random-access sequenc
TAG :cpp
Date : August 02 2020, 05:00 AM , By : Sam
Two index's of an array have same memory adress
it should still fix some issue I was working on a project to practice movement through an array and I found a very weird occurrence. While messing around, I discovered that when I moved my player to the edge of the array, it showed up on the edge and
TAG :cpp
Date : August 02 2020, 02:00 AM , By : Yevish
how do i avoid integer division in c++?
This might help you This is my code: , Your first job is to replace
TAG :cpp
Date : August 02 2020, 01:00 AM , By : josmassive

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