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Basic idea: The log class provides three basic interfaces (member functions): Start log componentStop() deactivates the log componentCommit() commit log message Each instance of class maintains a log message queue and a resident thread; The user starts a resident thread through the Start() function to take the log from the log message queue ...

I inherit The essence of inheritance is to reuse the data members and methods of the base class  The essence of encapsulation is to expose only the necessary use interfaces to the outside world. The internal specific implementation details and some core interfaces are invisible to the outside world, hide the details, and only open the nec ...

catalogue 1. Basic concept and definition of inheritance 1.1 basic concept of inheritance 1.2 definition of succession 2. Assignment conversion of base class and derived class objects 3. Scope in inheritance  4. Default member function of derived class 4.1 calling order of constructor destructor of base class derived class ...

In the programming process, it is often used to call other programs in the program. This calls for process calls. In QT, the process calls of QProcess are used. It has the characteristics of QT itself, which is very convenient to use, and is different from the interface of C++ itself. Its flow characteristics are as follows:Feature 1: waitForSt ...

1. Function object Concept: A class that overloads the function call operator. Its object is often called a function objectWhen a function object uses overloaded (), its behavior is similar to that of a function call, which is also called an imitation function Essence: A function object is a class, not a function Features of function o ...

Type conversion in C language In C language, if the types of the left and right sides of the assignment operator are different, or the shape participating argument types do not match, or the return value type is inconsistent with the received return value type, type conversion is required. There are two forms of type conversion in C langua ...

To facilitate users to quickly master and understand spire Xls, the following small series summarizes and arranges a series of common problems in the trial process of probationers, hoping to help you! ---------------<<Spire. Download the latest version of xls>>  (1) How do I add an image to Excel? A: please call the Add method to ...

Author: Steven Copyright notice: the copyright belongs to the author. For commercial reprint, please contact the author for authorization. For non-commercial reprint, please indicate the source   preface This paper introduces a classical algorithm backtracking method, which can be used as a solution to the maze problem. The following is ...

The content of this article is dynamic memory. This piece is a little advanced. It's a part I've rarely touched before. There are several concerns: global object, local object, local static object and dynamic object. Refine: static memory, stack memory, free space (heap). Different memory spaces have corresponding objects. 1, Dynami ...

catalogue 1, Structure 1.1 declaration of structure 1.2 special declaration: anonymous struct type 1.3 structure self reference 1.4 definition and initialization of structure variables 1.5 structure memory alignment 1.5.1 why is there memory alignment? 1.6 modify the default alignment number  1.7 offsetof: 1.8 structural transmission ...