Programmer Group

Section 7 single case design pattern, shared data analysis, solution, call_once 1. Design mode The program is flexible and easy to maintain. The code written with the concept of design pattern is very obscure, but it will be painful for others to take over and read the codeWhen foreigners deal with particularly large projects, they summariz ...

Strategic model, also known as policy model Definition: define a set of algorithms, encapsulate each algorithm and make them interchangeable. The algorithm mentioned here is a function; Encapsulation is to declare virtual functions with base classes, inherit and implement functions with Subclasses; Interchangeability means that the base class ...

Stream and file I/O operations: Input flow: the flow direction of data is to enter the program; Output stream: the flow direction of data is to leave the program; File I/O: To write data to a file or read data from a file, you need to use ofstream and i fstream in the fsstream library; #include <iostream> #include <fstream> #inclu ...

Single linked list C + + version of data structure There is an STL list in C + +. The bottom layer is a two-way linked list. Here, a single linked list is written to play. Included header file #include <iostream> Nothing else. If you want to be more rigorous, add a new header file #include <new> Structure description lin ...

Reference article: (4 messages) ROS robot practice - Little Turtle draws a circle_ Poetry and distant blog - CSDN bloghttps://blog.csdn.net/qq_44907912/article/details/105145132 Reference video: [Gu Yueju] Gu Yue · introduction to ROS 21 lecture | introduction to ROS robot_ Beep beep beep_ bilibilihttps://www.bilibili.com/video/BV1zt41 ...

This article mainly introduces the development of pygame. Through this article, you can use pygame to develop a Marseille logic game ~ friends in need can use it for reference. I hope it can be helpful 1, Game introduction Marseille logic is a logic game similar to Sudoku and minesweeping. It lights up the square according to the data prompts ...

0. Introduction This blog It's very well written. Most of it is reprinted from this blog in case of forgetting. At the same time, some content is added and expressed in C + +. It's all repeated wheels. It's shameless to mark it as original. Ref01. Generalization, implementation, association, aggregation, composition and dependency in UMLR ...

Pro Codeforces Round #748 (Div. 3) Sol D2. Half of Same I thought of the positive solution during the game, but it took more space than the positive solution, so I didn't write it out. It's almost the same as D1, but it's not necessarily the smallest one. Therefore, the number of enumerations at each location should be the minimum. Then s ...

0.Summary: Templates are the basis of generic programming, which writes code in a way that is independent of any particular type. Templates are blueprints or formulas for creating generics or functions. Containers, iterators, algorithms, and so on, are examples of generic programming. In C++, templates are divided into function and class tem ...

2.1.6 button box   The button box can easily and quickly arrange a group of standard buttons. For example, the common confirmation dialog boxes have standard buttons such as "OK" and "Cancel". Qt makes these typical buttons into standard button boxes and encapsulates the corresponding signals for the convenience of program ...