Programmer Group

Today, I summarized some common errors in C + + programs, which we should try our best to avoid 1. Operation sequence error Let's look at a procedure for judging odd and even numbers: #include <stdio.h> int main(int argc, char** argv) { int n = 0; printf("Input a natural number:\n"); while (1 == scanf("%d", &n)) { if (1 & ...

Experimental Background The full name of STL is Standard Template Library. STL involves many aspects, including but not limited to containers, iterators, algorithms, and function objects. This blog only introduces the most intuitive content of STL, involving principles and deeper concepts. You need to look for your own materials to learn. ...

1, Experimental purpose By simulating several basic page replacement algorithms for request page storage management, understand the characteristics of virtual storage technology, master the basic ideas and implementation process of several basic page replacement algorithms in virtual storage request page storage management, and compare their e ...

1, I2C introduction 1. IC2 introduction I2C communication protocol (Inter Integrated Circuit) is developed by Phiilps company. It has the advantages of few pins, simple hardware implementation, strong scalability and no need for external transceiver equipment of USART, CAN and other communication protocols. The connection mode of I2C on ...

733. Image rendering LeetCode simple single \color{#00AF9B} {simple} simple There is a picture represented by a two-dimensional integer array. Each integer represents the pixel valu ...

Congratulations on finding this article. In my recent work, I need to use QT to write many functions about point cloud processing. There are too many pits in this process. (unable to resist the temptation to make complaints about PCL+VTK, the direct pop-up display of the point cloud is very simple. However, embedding VTK into Qt to display ...

  man has nine volumes. System programming is the content of Volume II, and volume V is file format and specification open function Function prototype Parameter pathname file name Macro with parameter flags as access mode: o_ Rdonly (read only), O_ Wronly, O_ Rdwr (read write) these three must be added O_ Append, O_ Creat, O_ Excl ...

STL Standard Library for C++ Initial Knowledge STL is an abbreviation for Standard Template Library, translated in Chinese as "Standard Template Library". STL is part of the C++ Standard Library. Previously, we had a basic understanding of the template templet in C++ and the role of templates. It can be said that C++STL is a pow ...

1. nullptr and std::nullptr_t C++11 allows you to use nullptr instead of 0 or NULL This new feature especially helps you avoid misunderstandings when "NULL pointer is interpreted as an integer value" nullptr is a new keyword that is automatically converted to various pointer types but will not be converted to any integer type For ex ...

Process control Create process fork //Create child process pid_t fork(void); //Success: the parent process returns the PID of the child process, and the child process returns 0; Failure: Return - 1, set errno value The parent-child process who preempts the CPU time slice will execute first Global variables cannot be shared between p ...