Programmer Group

First, let's look at an example. #include <iostream> #include <vector> #include <algorithm> #include <iterator> using namespace std; class Widget{ public: Widget(int a) : m_a(a) { } int value() const { return m_a; } bool test() { return m_a % 3; } private: int m_a; }; bool test(const Widget& ...

Concurrent API usage 0 Basics Hardware thread (logical core): the thread actually executing the calculation (number of hardware threads = number of physical CPUs * number of physical cpu cores * number of logical cores per core (2) [with hyper threading technology enabled])Software thread: the thread used by the operating system for cross ...

2019 1. Students' scores can correspond to different grades according to different score segments, for example, 90-100 is A; 80-89 points are B; 70-79 is divided into C; 60-69 points are D; Below 60 points is E. It is required to input the student score of the hundred mark system, and output the score grade corresponding to the student score. ...

Attach the program effect first: Adjacency table: Adjacency matrix, that is, a two-dimensional array is used to store the relationship between each vertex and the corresponding edge. For example, if there are edges between two vertices, set the subscript corresponding to this two-dimensional array to a non-zero value. As shown below: Undirec ...

Before C++11, the copy control of objects was determined by three functions: Copy Constructor, Copy Assignment operator and Destructor. After C++11, two new functions are added: Move Constructor and Move Assignment operator. give an example: #include <iostream> using namespace std; class A { public: int x; A(int x) : x(x) ...

2021SC@SDUSC         In the first eight articles, we analyzed the relevant source code under the Actors package of the physical engine in the flax Engine game engine. From this time, we will analyze the source code for the Joints package of the physical engine in the flax Engine game engine. Before analyzing, we should f ...

describe A connected graph uses adjacency table as storage structure. An algorithm is designed to judge whether there is a simple path with length k at any given two points in an undirected graph. input Multiple groups of data, each group of m+3 data rows. The first line has two numbers n, m and k, representing n vertices, m edges and length ...

1, Naive Bayes overview Naive Bayesian method is a classification method based on Bayesian theorem and the assumption of feature conditional independence. For a given training set, firstly, the joint probability distribution of input and output is learned based on the independent assumption of characteristic conditions (the naive Bayes method, ...

021. Delete the penultimate node of the linked list Title: Given a linked list, delete the penultimate node of the linked list, and return the head node of the linked list. Example: Input: head = [1,2,3,4,5], n = 2 Output: [1,2,3,5] Idea: Fast and slow pointers: the slow pointer is the head node, the difference between the f ...

1, Title Description Description The preorder traversal and inorder traversal of a binary tree are given, and the number of leaf nodes of the corresponding binary tree is counted. This question requires the use of a binary linked list, otherwise even if it passes, points will be deducted as appropriate. Input Input two lines of string compo ...