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Test Code #define _GNU_SOURCE #include<sched.h> #include<stdio.h> #include<stdlib.h> #include<unistd.h> #include<stdint.h> #include<sys/wait.h> #include<sys/types.h> typedef void (*spawn_proc_pt)(void*data); static void work_process_cycle(void*data);//Function of work static void start_processes ...

0. Basic knowledge 0.1. Input and output 0.1.1 basic input and output Input normal int n; cin>>n; cout<<n; Enter with spaces string str; cin(cin,str); 0.1.2 header file Common header file #include<bits/stdc++.h> using namespace std; 0.2. Common operations on strings substr string str='123'; string temp=str.s ...

1. Write a program that requires users to input two integers. The program will calculate and output the sum of all integers between the two integers (including the two integers). It is assumed that a smaller integer is entered first. For example, if the user enters 2 and 9, the program will indicate that the sum of all integers between 2 and 9 ...

1, Introduction to C + + Basics C + + is the inheritance of C language. It can not only carry out procedural programming of C language, object-based programming characterized by abstract data types, but also object-oriented programming characterized by inheritance and polymorphism. While C + + is good at object-oriented programming, it can als ...

The role of design patterns If the function of the algorithm is to let us write efficient programs, the purpose of the design pattern is to let us write good, extensible and standard code. SOLID design principles In software design, we should follow some principles. SOLID five principles are very common in software design. S principle of ...

#Data structure and algorithm Introduction There is no best algorithm in the world, only the most suitable algorithm Logical structure Physical structure Talk about algorithm Algorithm time complexity Just tell you to pay attention to the highest order, then ignore the constant product of con ...

Navigation for this series of articles:   Write C + + server by hand (0): column - Summary navigation [updating]  The default blocking mode is used when connect is created, but in reality, the connection speed may be slow due to poor network, intermediate proxy server, gateway and other factors. At this time, in blocking mode, the pr ...

Trie Tree A Trie tree, also known as a dictionary tree, or word search tree or key tree, is a tree structure and a variant of a hash tree. Typical applications are for counting and sorting large numbers of strings (but not just strings)It has the advantage of minimizing unnecessary string comparisons and being more efficient than hash tables. ...

(previously: WIN10 professional + QT5.15.2: control promotion - CSDN blog / / reference: function introduction of "promotion to..." in qt creator - Snail - blog Garden 1. Create a new project 2. Open the file: mainwindow.ui - > drag a tree widget control to the canvas - > right click the pop-up dialogue box - > Click "pr ...

C++ | C++ STL array container Detailed usage of C++ array(STL array) container array Container is C++ New Sequence Container in 11 Standard ( std::array In a nutshell, it adds some member functions and global functions on the basis of C++ normal arrays. It is safer and less efficient to use than normal arrays. Unlike other containers, ar ...