C language function collection This article introduces the complete set of C language functions — functions starting with x 1. xdr_struct 1.1 Function Description Function Declaration Function Function bool_t xdr_struct(XDR *xdrs, void *addr, …); for encoding or decoding structures Body data Parameters: xdrs : Pointer to the XDR data structure representing the data stream to […]
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Qt writes video surveillance system 75-calculates real-time bit rate and displays it
1. Foreword For real-time video display of surveillance cameras, it is generally required to display real-time statistics on the channel screen. One is to test the performance of the entire software, and at the same time check whether the current stream is the main stream or the sub-stream, and whether the device is The video […]
IT company’s auspicious “tree” binary tree – (heap) C language creation
Directory Preface 1. Tree concept and structure ?basic concept ?Proper noun for tree ? tree representation Child brother notation 2. Concept and structure of binary tree ?concept A binary tree in reality (also known as the mascot of an IT company) ?Special binary tree ?Properties of Binary Trees ?Storage structure of binary tree sequential storage […]
C language: the size of structures and unions (nesting)
Calculating the size of structures and unions (nesting) In C language, structure and union are two very common data types, which are used to define a set of related data, which can make the program more flexible. In the actual application of structures and unions, it is often necessary to accurately calculate their size in […]
Understanding linux file system/folder name explanation
The linux system is used by many code developers because of its efficient and direct underlying operations. When it comes to linux, everyone’s general impression is the dark terminal command line. Later, the ubuntu version with a visual desktop was developed based on the linux system. Everyone’s experience takes into account the intuitiveness of the […]
C language data structure – tree, heap (heap sort), TOPK problem
Blogger’s homepage: @. A bright moon? ?Column series:Linear algebra, C beginners training, problem solving C, C use articles, “beginner” C++, data structure Motto:“Don’t wait until you have nothing before making up your mind to do it” If you think it’s good, I beg you to pay a little attention, a little love, and give pointers […]
18 classic programs (including source code) that must be memorized in C language
1. C language must memorize 18 classic programs The thousands or even tens of thousands of lines of C language program codes you see are all written with some basic statements and keywords. It’s just that their logic functions are different, so how to quickly get started with C language codes, it is recommended to […]
SAP ABAP planned order to purchase requisition MD14
Users feel that it is too troublesome to transfer planned orders to purchase requisitions one by one through MD14. Although MD15 can be batched, it also needs to be confirmed one by one. When business consultants can’t convince users to check out standard features, the pressure is on technology. After research, the function MD_PLANNED_ORDER_2_REQUISITION can […]
Java implementation of Airplane Wars 2.0 game (open source)
Foreword: The game is based on [Shangxuetang] Aircraft Battle 2.0 at station B, the main frame remains unchanged, and the code is slightly changed. Java technology: java variables, java data types, judgment statements, loop structures, arrays, Java collections, simple window creation, graphics and picture drawing, double buffering technology, events-mouse and keyboard events, object collision detection. […]
Example explanation of the line parameters (argc, argv) of the main function
Directory foreword 1. Problem description 2. The meaning of line parameters 3. Topic application 1. Code (focus on Chinese comments) 2. Execute the test Foreword When doing the problem set–plurality of CS50 Week3, I encountered two line parameters (int argc, string argv[]) in the main function, which caused the code to be unclear at once. […]