c++

There was a question about the virtual destructor. As far as I understand-a virtual destructor is needed so that in the inhe ... ted class, then you need to create a virtual one. And all this so that there is no memory leak. Did I get the point right?

How can I find the substring of the entered string in C++? For example, I entered the string: "Hello World", then I enter "ll ... let it output true. Here is something you need to create, but I do not know how to give a search in the string for a match.

I am writing a joke program that will change the image of the desktop: An error occurred in one of the lines of code: System ... wears that it is impossible to convert const char* to PVOID. I think I missed something somewhere. What could be the problem?

Hello! The question arose whether there are books for learning Qt, but not such as it usually happens, which tell something s ... s library. Russian Russian books are desirable, but if they are not in Russian, I don't mind reading them in English as well.

There is a class in which there is such a variable PoolWrapper<FrameManager> m_PoolWrapperFrameManager; Here is its ... r<FrameManager>' cannot be assigned because its copy assignment operator is implicitly deleted What am I doing wrong?

I write programs for uni, I always made do with the console, and then I needed to make a program that displays the Cartesian ... est way to implement this. I think the simplest is Visual C++ and the CLR in Visual studio, but maybe there is a simpler one?

Good day to all! The essence of the problem is as follows: there is a certain number n and its binary preposition, after a ce ... cout << mx << endl; } return 0; } But I get the following error Please help me solve the problem

Very simple, but it doesn't work. #include <cstdlib> #include <iostream> #include <math.h> using namespace ... lt;< "\n"; system("PAUSE"); return EXIT_SUCCESS; } You need to delete an array element from this array by index.

There is a file core.cpp with some functions. How do I properly connect core.cpp to my project? In addition, both core.cpp an ... n module of the project contain the directive #include <windows.h>. Will this not lead to a conflict in the conclusion?

There is a project for quite a lot of files (. cpp and .h project in C++). In general, I decided to use git. I filled in the ... re project on git, do I need to commit each file? That is, to sit and describe each file? And how to write commits correctly?

As for me, in C there is a transfer of arguments to a function only by value, and in C++ in fact, too, only a transfer by val ... ameters are simply initialized somewhere between the signature and the body in the scope under which the function body falls.

#include "pch.h" FARPROC loadDll(LPCWSTR dllname, LPCSTR procName) { setlocale(LC_ALL, "Rus"); HMODULE dll = Lo ... ID method=env->GetMethodID(cls, "println",("Ljava/lang/String;)V"); cout << "" << endl; return 0; }

There was a problem I want to write a simple neural network in C++, but I ran into one problem, I need to multiply the mat ... "output: " + str(output)) return activation_function(output) == 1 print("result:" + str(predict(vodka, rain, friend)))

How do I declare all this and then get the return value?

I implement an affine cipher. It is necessary that the words can be entered only without a space. But it is not possible to i ... out << "Расшифрованное сообщение: " << decryption(c) << endl; } _getch(); return 0; }

I want to implement the Vector class as an entity of a linear space, and then inherit the usual DoubleVector and Matrix from ... peration is not defined, so the code will drop. Question: is it possible to solve this problem without rewriting the methods?

Is there any difference in performance, or are there any Pros and Cons to using such a design at all: Type* a = new Type(); ... be stored / processed roughly as a reference to at a lower level? I will be grateful for your explanations in this matter.

Why the find() method uses a pointer. That is, in this example #include <iostream> // std::cout #include <algori ... ay. We just need to search for it in the array and that's it. Why can't this be done without a pointer? Thank you in advance!

Is there a way in C++ to restrict access to certain class functions when writing code? So that in some IDE, in one case, the ... y f1 be open? So that f2 and f3 are not displayed in the tooltip. Perhaps there is a way to solve it without using templates?

I have a couple of questions from a beginner. If a program compiles correctly in VS, will it compile correctly in g++(GCC) ... s 10, will it compile correctly on Linux? Is it possible to check whether the program will compile in Linux and in g++(GCC)?