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Is list initialization direct initialization? Or there is no relationship between the two ...
some people say it in order to avoid ambiguity. for example: class Widget { private: typedef int x; int z(x); }; this becomes the function declaration. however, you can also write outside the class. typedef int x; int z(x); I don t think a...
int array [3] = {1,2,3}; std::cout < ...
problem description my regular expression has always been a blind spot. I hope my friends can help write a regular expression to extract the title, picture link, article link and description of the following web page. Thank you here! regular web pag...
for example, there is now a task to call the dll, generated by fortran. Due to the long calculation process, in order not to give the user the illusion that the program is dead, it is necessary to give the user real-time feedback on the progress of the c...
has done a small project. The need is to use Haikangwei s webcam to monitor a certain area. If someone shows up, report the alarm information. Originally, I wanted to use fluorite clouds to get relevant information, but I had to pay for it, so I can onl...
how to convert a string to an enumerated type in cPP? for example: enum City{ BEIJING, SHANGHAI, GUANGZHOU } City string_to_enmu(string str,City c); ...
problem description A very common automatic update software, an update EXE and a main program EXE, found on WIN10 that if the update EXE does not have administrator privileges to run, disk C cannot write to any files. So you can only right-click the a...
topic description QT+VS2017 cannot call DLL generated by Fortran sources of topics and their own ideas the problem I encountered in my study was thought to be a path problem, but I couldn t use an absolute path, and I couldn t copy the dll file ...
when the client communicates with the server, the message is encrypted, and then the message is signed. The information on this signature network is all about preventing the message from being modified, but I am thinking about a question. If the message ...
struct __nat {int __for_bool_;}; _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR nullptr_t(int __nat::*) : __lx(0) {} _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR operator int __nat::*() const {return 0;} What is the use of ? ...
requirements: C language implements producer-consumer model student_queue queue producer thread consumer thread question: when getting data from the queue, student is not assigned after the student_queue_get () function is executed st...
topic description in the fun call of the TcpSocket, function derived from the base class socketBase, the this pointer of the derived class is passed to the function that takes the socketBase pointer of the base class as an argument. In the function, t...
-sharpinclude <iostream> int main() { using namespace std; char a[3]; strcpy(a,"affd sfasdfsdf"); cout << a[5] << endl; cout << a << endl; } the output here is: s affd sfasdfsdf strange, the...
define a function and a pointer to it, and then determine whether the function pointer is a function after dereferencing void test1() {} int main() { void(*t1)() = test1; std::cout << std::is_function<decltype(*t1)>::value << ...
introduction to QT, entry to windows development. I want to use QT to achieve a function of simulating mouse clicks (Windows platform). Specifically, it goes like this: first get the handle of a specific name window, and then simulate clicking on a sp...
problem description throw n dice, and the sum of the numbers above is S. Given Given n, list all possible S values and their corresponding probabilities. sample given n = 1, return [[1,0.17], [2,0.17], [3,0.17], [4,0.17], [5,0.17], [6,0.17]]. pub...
1) A stream is small in size, and frogs can jump from the left bank to the right bank. There is a stone pillar L on the left bank, and the stone pillar L area can only accommodate one frog. Similarly, there is also a stone pillar R on the right bank, an...
the first and second use cases of the topic always fail. Can the bosses help see what s wrong? -sharpinclude <iostream> -sharpinclude <string> using namespace std; string s1, s2, s3, s4; string day[] = {"MON","TUE",...
how to configure packaged less? for UmiJS projects created by scaffolding are full of css files: https: umijs.org zh guide cr....
Mobile page long press to appear copy, search, share and so on a small black box, here is a long button can appear such a thing, what is the way js can trigger such a copy, search, sharing and so on a small black box? ...
the error message is as follows. What is the cause? secneo@localhost:~ tmp > sudo usr sbin rabbitmq-server RabbitMQ 3.6.1. Copyright (C) 2007-2016 Pivotal Software, Inc. -sharp-sharp-sharp-sharp Licensed under the MPL. See http: www.r...
I used to start Windows, through ubuntu s Grub, but now I suddenly can t. I took a look at the efi file. What is the reason for reporting this error? (now you can only start Windows by changing BIOS) ...
element-uipopver popover ...