Programmer Group

Directory of Audio and Video Introduction Articles Four-byte alignment of BMP images The bits representing the pixels in BMP bitmaps are aligned in action units, and the size of each row is taken up as a multiple of 4 bytes (32-bit DWORD). If the height of the image is greater than 1, multiple lines aligned by filling form an array of pixels. ...

1. KMP+Maximum and Minimum Representation Maximum and Minimum Representation Maximum and minimum representation is used to solve the problem of string isomorphism. In the time of complexity of $O(n) $, it finds the starting position of the largest (smallest) lexicographic sequence in all isomorphic strings of a string. Application: Give $n $ci ...

Catalog Definition of polymorphism Compile-time polymorphism Runtime Polymorphism Implementation principle of virtual function Instance analysis of mechanism of virtual function table What is polymorphism Polymorphic C++ is one of the three main features of object-oriented (OOP) language (the other two are encapsulation and inheritance) Poly ...

1. Qt event handling A. Message processing model for GUI applicationsB.Qt platform converts system generated messages into Qt events1.Qt event is an object of QEvent2.Qt events are used to describe actions that occur inside or outside a program3. Any QObject object has the ability to handle eventsEvent handling for C.GUI applications1.Qt event ...

Webcc is based on Boost Asio The lightweight C++ HTTP library is developed, which supports both client and server. A few years ago, it only supported simple SOAP calls (cSoap), which gradually evolved into a pure HTTP library. At present, it has more than 250 code submissions and is still improving. It has been applied in our company's product ...

Topic Description Michael likes skiing. It's not surprising, because skiing is really exciting. But in order to get speed, the sliding area has to tilt downward, and when you slide to the bottom of the slope, you have to go up again or wait for the elevator to pick you up. Michael wants to know the longest landslide in an area. The region is ...

As a classic game, Sanziqi is very helpful for us to learn C language more systematically in the future if we can understand and realize its game function skillfully. Let me share my experience and code in programming. First of all, introduce the rules of tri-chess: as long as you connect your own chess into a line (row, column, diagonal), tha ...

Topic Background Xiao Xin often accompanies Xiao Bai to play in the park, which is the so-called dog walk. Topic Description There is a "Park Road" near Xiaoxinjia. On one side of the road, there are nn parks in turn from south to north. Xiaobai has looked at them for a long time, and he does not know which parks to visit. F ...

1. Brief introduction Internet is full of all kinds of network services. When providing network services to the outside world, the server and the client need to follow the same set of data communication protocols in order to communicate normally; just like you communicate with Taiwanese in Minnan and Cantonese in Cantonese. When implementing i ...

Reference resources: 1,https://msdn.microsoft.com/zh-cn/library/ms235636.aspx Walkthrough: Creating and using dynamic link libraries (C++) 2,https://msdn.microsoft.com/zh-cn/library/ms235627.aspx Walkthrough: Create and use static libraries (C++) Summary: 1. Creating and using dynamic link libraries 1 #ifdef MATHFUNCSDLL_EXPORTS 2 #define ...