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g++ command line macro define byte stream
I wish did fix the issue. First this depends a lot from your environment, and the shell that you are using. For /bin/sh you could try something like
TAG :cpp
Date : October 22 2020, 03:08 PM , By : redtapecoding
Why won't my variadic macro accept no arguments correctly?
it helps some times Overloading Macro on Number of Arguments , The C standard specifies
TAG :cpp
Date : October 22 2020, 01:08 AM , By : mdheller
Clang adds noinline attribute to all functions when emitting LLVM IR
fixed the issue. Will look into that further With -O0, you can't enable inlining globally, judging from Clang's source code (Frontend\CompilerInvocation.cpp):
TAG :cpp
Date : October 21 2020, 03:08 PM , By : Razziel
as rptr->num=30 is same as (*rptr).num=30 but*((*rptr).ptr).name does not work why?
I wish this helpful for you I have two structures , The line:
TAG :cpp
Date : October 21 2020, 03:08 PM , By : Byskat
How to use get() multiple times in c++ 11 future or how to get a vector values?
hop of those help? When you create your vector you initialize it with n elements. These futures aren't associated with anything so when you try to wait on them they throw an exception. To fix, change:
TAG :cpp
Date : October 21 2020, 01:08 AM , By : P. Harprecht
libstdc++ cannot find thread file on Mac
wish of those help The version of libstdc++ shipped with Xcode is very old, and it doesn't not include thread. pthreads on macOS is missing some functions with timeouts (e.g. pthread_mutex_timedlock()).You simply can't use std::thread and Xcode's sup
TAG :cpp
Date : October 21 2020, 01:08 AM , By : mahesh sahu
Check if macro is odd in c++
wish helps you In C++11 you can use static_assert for this.
TAG :cpp
Date : October 20 2020, 03:08 PM , By : Atique Akbani
What is the fastest method to create uniform random numbers in c++
I wish this help you It's almost the same as yours. I just don't see any need for a binder or a lambda.EDIT: I also changed the generator from mt19937 to minstd_rand which has made the code 88 times faster. With mt19937 the code has aproximately the
TAG :cpp
Date : October 20 2020, 03:08 PM , By : Grant
C++ - difference between first two elements
will be helpful for those in need Yes it is possible. Access the first element via the std::set::begin iterator and the next one using the std::next function.
TAG :cpp
Date : October 19 2020, 03:08 PM , By : Roland Harangozo
Repeated inheritance and static_cast
hop of those help? Your question is easier to understand if you rephrase it to be "is it legal to static_cast from Holder_A_base_2 * to Holder_B_base *?" No, it isn't, and it won't compile.Casting from Anchor * to Holder_B_base * will compile but wil
TAG :cpp
Date : October 19 2020, 03:08 PM , By : Okumanash
C++ template class, how to declare a copy constructor for a specific situation?
like below fixes the issue The reason is because of inside SmartPtr there is the value member variable:
TAG :cpp
Date : October 19 2020, 03:08 PM , By : A. Andrews
return 1 return 0 in case of factorial
This might help you I need general explanation of the code:
TAG :cpp
Date : October 19 2020, 01:08 AM , By : Oscar Torre
Best way to hash a vertex
wish helps you There are 5 easy steps to end all your std::hash woes.TL;DR - dump std::hash at the earliest opportunity and use boost. Like much of the standard library inflicted on us since c++11, it's a lacklustre shadow of the boost library that p
TAG :cpp
Date : October 19 2020, 01:08 AM , By : user7447056
How append rectangle to QGraphicView
With these it helps With scene = new QGraphicsScene(this); you create a new scene and add the rectangle to it. The old scene with the previous rectangles exist but is not shown anymore. So instead of creating a new scene use the old one like that: re
TAG :cpp
Date : October 19 2020, 01:08 AM , By : richard stockerson
Extract points from PointCloud with PCL
may help you . You can use the pcl::ProjectInliers class which does exactly that: it projects the points onto a parametric model (e.g. plane, sphere, ...). There's even an handy tutorial for it!Here's an extract from the tutorial which creates a plan
TAG :cpp
Date : October 19 2020, 01:08 AM , By : Alejandro Spicker
Handling gcc's noexcept-type warning
it should still fix some issue There's several things you can do about the warning message.Disable it with -Wno-noexcept-type. In many projects the warning message is unhelpful because there's no chance the resulting object will be linked with an ano
TAG :cpp
Date : October 18 2020, 03:08 PM , By : Kirill Kravchenko
Floating point math going wrong using cpp_bin_float from boost::multiprecision
should help you out This looks like a bug in boost. When the exponent template argument is a 64-bit integer type, the result of exp is rounded to an integer. This doesn't happen when int is used in place of long long int.Edit: I have tracked the bug
TAG :cpp
Date : October 18 2020, 03:08 PM , By : david_cc
Optimise a recursive function
I wish this help you The time sink is when you are printing the value and flushing the output (std::endl).You could avoid that time sink by using a type of "buffer", like a std::vector that you could then iterate over to print. In this way, the time
TAG :cpp
Date : October 18 2020, 03:08 PM , By : grzyb__ek
Omit the newline character in reading file with c++
around this issue I have this code: , Use the stream operator >> to read integers:
TAG :cpp
Date : October 18 2020, 01:08 AM , By : Jaro
How should I manage ::std::cout after changing file descriptor 1 to refer to a different file?
it helps some times Option 1: set stdin stdoutAccording to cppreference.com:
TAG :cpp
Date : October 18 2020, 01:08 AM , By : Eric Henson
Inheriting traits classes after a slight change in template type
I think the issue was by ths following , If you accept to pass Q instead of Q and std::integer_sequence (or std::integer_sequence) instead of std::integer_sequence (so a template type instead of a template-template type) you can fork the cases (with
TAG :cpp
Date : October 18 2020, 01:08 AM , By : RABBIT
How do I specify different libraries for a static Qt project?
I hope this helps . I think your qmake definition is a little of. The CONFIG(debug, debug|release) syntax is a special construct, as always both are defined, and this finds out witch build is actually used. For static, thats not the case, so simply d
TAG :cpp
Date : October 18 2020, 01:08 AM , By : mr23m4n
Parent class turned into subclass Pointers C++
this one helps. I have a pointer that is set to a new array of objects: , You have to create an array of Animal-pointers first.
TAG :cpp
Date : October 18 2020, 01:08 AM , By : Mark
alternative of if else-if else statement c++
I wish this help you I'm trying to expand my knowledge of conditional statements in C++ , what would be a good alternative?
TAG :cpp
Date : October 17 2020, 03:08 PM , By : Sheronica JohnsonSr
SetProgressValue() not working within ConEmu
Hope this helps When you run console application in ConEmu the GetConsoleWindow() returns virtual console HWND rather than native conhost HWND. However both sent suitable for SetProgressValue() because virtual console is a child window of ConEmu (whi
TAG :cpp
Date : October 17 2020, 03:08 PM , By : Rachit Agrawal
Debugging compiler failure
will be helpful for those in need Does the program compile if you place the header file "Adafruit_MQTT.h" in the same directory as your main.cpp?Using the quotes around the name of the header file makes the compiler look for the file in the same dire
TAG :cpp
Date : October 17 2020, 03:08 PM , By : Vinayak
Why My Applicaion cannot display unicode character correctly?
To fix the issue you can do Make sure to save the source file as UTF-16 or UTF-8 with BOM. Many Windows applications assume the ANSI encoding (default localized Windows code page) otherwise. You can also check compiler switches to force using UTF-8 f
TAG :cpp
Date : October 17 2020, 03:08 PM , By : Robert Verboom
"Destructor already defined" with a specialized destructor
may help you . Chances are your Cat.cpp and main.cpp translation units both include the same Cat.h header file. Put your entire template class in a header file, remove the Cat.cpp translation unit and compile without it.Live example
TAG :cpp
Date : October 17 2020, 03:08 PM , By : Brandan Schmitz
Is there a way to replace a function within a method in c++
To fix this issue You can wrap your code within a function template taking a variadic parameter set, and forward that on the matching Fn callable parameter (I omitted some irrelevant stuff):
TAG :cpp
Date : October 17 2020, 03:08 PM , By : creole69
MySQL c++ connector how to retrieve auto increment keys from insertion query
wish help you to fix your issue Last year I faced the same problem. The solution was to use the builtin LAST_INSERT_ID(). Following I changed the getting start example 2 to show how to use it:
TAG :cpp
Date : October 17 2020, 01:08 AM , By : Samuel Adams
What is minimal work needed to reconnect existing socket to new server?
To fix this issue What is minimal work needed to reconnect existing socket to new server?
TAG :cpp
Date : October 17 2020, 01:08 AM , By : Oladapo Simbo
In c++ how do I go about using pointers to get the average of an array?
I wish this help you First of all your function getAverage() has different prototype than that you defined. And secondly you try to pass std::unique_ptr object into a function that instead expects a int*. But std::unique_ptr is a different type than
TAG :cpp
Date : October 16 2020, 03:08 PM , By : TOGR
How to print to file using ostream_iterator?
seems to work fine The type of std::cout and the type std::ofstream are both derived from std::ostream, which is the same type that std::ostream_iterator operates on:
TAG :cpp
Date : October 16 2020, 03:08 PM , By : Roberto Oliveira
Using cin.get() doesn't seem to read the character I'm expecting. What's wrong?
it helps some times I would recommend you to use cin>> instead of cin.get() as the cin.get() after every initialization is there to "grab" the newline character that gets put in the stream every time you press enter.
TAG :cpp
Date : October 16 2020, 03:08 PM , By : Drew Faber
C++ template class with non-type parameter: how to overload the assign operator?
I think the issue was by ths following , I'm writing a template class with non-type parameter , To implement copy, you need something like this:
TAG :cpp
Date : October 16 2020, 01:08 AM , By : arpit sharma
why compiler is not showing error when I have two functions one will take base class and one will take derived class as
Hope this helps Simple answer: The two functions does not conflict because they do not have the same signature.When you call one with a base instance, it won't fit into the derived class reference, so operator+(int, base) will be called.
TAG :cpp
Date : October 16 2020, 01:08 AM , By : Justin B
map.find() not finding key c++
I wish this helpful for you As mentioned we are getting newline character in the keys from getline(ptr, len, stream) and after removing that code works fine for user entries. I used below code to correct to remove newline characters
TAG :cpp
Date : October 16 2020, 01:08 AM , By : Elena Albu
Determining if `x` hours have elapsed since start
it helps some times Yes, using the time since epoch in hours could work. Continuously update the current time until it is x hours since the last alert, print your alert, update alert time and repeat until you are finished monitoring. For this example
TAG :cpp
Date : October 16 2020, 01:08 AM , By : Chris Granström
chaining method of same object
Hope this helps Your incrementX and incrementY functions return by value. That is to say that upon return from those functions your object is copied and so subsequent operations occur on a different instance.You could see an error occur in compilatio
TAG :cpp
Date : October 16 2020, 01:08 AM , By : user7447824
C++ any iterator with a specific value type?
it helps some times You can get the value_type of the iterator via std::iterator_traits, and then check it at the compile time, e.g.
TAG :cpp
Date : October 16 2020, 01:08 AM , By : user7447820
C++ hash_map.clear() is slow if compiled in debug configuration
Does that help TL;DR: std::hash_map isn't the right tool for the job. It's a non-standard extension that was deprecated in MSVC years ago. Read up on std::unordered_map, it should meet your general performance requirements. Also, see this.I'm using V
TAG :cpp
Date : October 16 2020, 01:08 AM , By : Amr Hka
How do you multiply two arrays with repeated addition in C++?
Does that help , how would I apply this to adding 2 arrays?
TAG :cpp
Date : October 15 2020, 03:08 PM , By : naomu
Calling Winspool API GetJOB issue
wish help you to fix your issue You have a pointer. Just see the declaration JOB_INFO_2 *pJobStorage1=NULLWith pJobStorage1[0].pPrinterName and pJobStorage1->pPrinterName you access the first element pJobStorage1 ist pointing to.
TAG :cpp
Date : October 15 2020, 03:08 PM , By : Sriram Mantha
Get nested class members without accessors or mutators
I wish this helpful for you If the class node is private to tree, you might as well just make it a struct. If node will be exposed to clients, you will probably need to write accessors anyway.
TAG :cpp
Date : October 15 2020, 03:08 PM , By : Alexia Vizcarra-Coro
Initialize vector member with the parameters of constructor
it fixes the issue If you want to initialize the vector members with the the parameters passed to CA::CA as elements, you can use list initialization (since C++11), for which the constructor of std::vector taking std::initializer_list will be used fo
TAG :cpp
Date : October 15 2020, 03:08 PM , By : Vinicius Cruz
How to convert a String to a char * in Arduino?
I wish this help you Updated: Your Question re: String -> char* conversion:String.toCharArray(char* buffer, int length) wants a character array buffer and the size of the buffer.
TAG :cpp
Date : October 15 2020, 03:08 PM , By : Andres Duque
Determine if a number contains a digit for class assignment
will be helpful for those in need Breaking the problem down is the key do not jump to code, start off by asking yourself, how do I extract digits?Use the % operator with 10. That's your current number % 10. Why 10? and not any other number? - We need
TAG :cpp
Date : October 15 2020, 01:08 AM , By : Leong Khoi
How to Pass a String in a function?
I hope this helps you . The main problem with your code is the indentation. Your code is not readable and mostly hard to comprehend it. Beautify it. Write nice, readable and a structured code. You can read more about indentation at the following link
TAG :cpp
Date : October 15 2020, 01:08 AM , By : Nitu Daimari
D3D12 unavoidable leak report
To fix the issue you can do You should try using the D3D12_RLDO_IGNORE_INTERNAL flag to ignore those items that have a RefCount of 0 but still have an IntRef.I prefer to use the DXGI debug device reporting instead of Direct3D's for the 'clean shutdow
TAG :cpp
Date : October 15 2020, 01:08 AM , By : Hélio Lino Júnior
Iterate sorted list and count distinct numbers
fixed the issue. Will look into that further Your code has following problems: You pass container by value to the function. You should pass it by const reference to minimize speed and memory loss. Your condition *it == *it+1 is always false (you comp
TAG :cpp
Date : October 14 2020, 09:39 AM , By : jihane
i am not understanding the syntax of this dfs implementation
I think the issue was by ths following , This is the standard dfs code. Root's parent is -1. So in every other case we will have a parent.
TAG :cpp
Date : October 14 2020, 09:39 AM , By : მწვან 'ე
How to do a custom 2D Kernel on Filter2D using 1D gaussian kernel
around this issue You have confused betweeen multiplication and convolution. You can use a filter h(x) alter for two sequence filter f(x) and g(x) by this fomular: h(x) = f(x) * g(x) which * is convolution operator. For matrix convolution you can ref
TAG :cpp
Date : October 14 2020, 09:39 AM , By : Todd
Call/move a function from inside an "if loop" of another function - Qt, C++
like below fixes the issue I assume you have connected loginButton::clicked() to FormLogin::OnLogin() already. In that method, at five attempts, you add another connection, to FormLogin::OnMasterLogin() but you leave the original connection still in
TAG :cpp
Date : October 14 2020, 09:39 AM , By : Douglas Aquilino
Smart Pointers for Binary Tree
Does that help If I have a binary tree where each node contain just pointers to children nodes, then unique_ptr works very well.
TAG :cpp
Date : October 14 2020, 09:38 AM , By : Kelly Emblem
Serial port ReadFile receives repeated data
wish helps you to the help of @quetzalcoatl, I was able to solve the problem. I have to check if the bytesRead are bigger then 0.Solution:
TAG :cpp
Date : October 14 2020, 09:38 AM , By : Sunny
Preserve indentation in C++ comments in vim
it helps some times As suggested by review, I repost an answer with answer from vi stackexchange community here:
TAG :cpp
Date : October 14 2020, 09:38 AM , By : Muhammad Khawar
qt chart move view with pressed middle mouse button
Any of those help you need to derive a class from QChartView and overload the mouse events:
TAG :cpp
Date : October 14 2020, 09:34 AM , By : YongH
Why is the code "foo::foo::foo::foob" compiling?
hope this fix your issue The injected-class-name is used here,
TAG :cpp
Date : October 14 2020, 09:30 AM , By : cisbody
Are type aliases used as type of function parameter part of the function signature?
should help you out A::foo and B::foo has same name (foo) parameter-type-list (T !!!) cv-qualification (not const, not volatile) ref-qualifier (None)
TAG :cpp
Date : October 14 2020, 09:30 AM , By : Frank
Test if all elements are equal with C++17 fold-expression
I hope this helps . The reason that doesn't work, unfortunately, is due to the fact that boolean operators don't chain in C++ like they do in other languages. So the expression:
TAG :cpp
Date : October 14 2020, 09:25 AM , By : xyunsh

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