An article plays with C language dynamic memory and easily manages dynamic memory space
1. Reasons for the existence of dynamic memory allocation When we generally define variables, we often use the following expression: char str;//Open up 1 byte of memory space on the stack int num;//Open up 4 bytes of memory space on the stack int arr[10];//Open up 40 bytes of continuous space UTF-8...
Posted by mooshuligan on Sun, 26 Sep 2021 23:56:17 +0530
Qt source code analysis - smart pointer
catalogue What is a smart pointer? Why use QT smart pointers? What smart pointers does Qt provide? QSharedPointer class template (smart pointer class) source code analysis 1. QSharedPointer class template redefines the type of template parameter T 2. Member attribute of qsharedpointer three QtSUTF-8...
Posted by n_wattam on Mon, 27 Sep 2021 00:29:19 +0530
Summary of C + + exception handling knowledge points
Exception handling mechanism If it wants this type of value, you give it an unqualified feedback and give you an error prompt. Exception is a program control mechanism, which is complementary to function mechanism. Function is a program control system connected by upper and lower functions expaUTF-8...
Posted by prasadharischandra on Mon, 27 Sep 2021 00:45:34 +0530
C++&Python description LeetCode 639. Decoding method II
C + + & Python description LeetCode 639. Decoding method II Hello, I'm Qi Guanjie (q í gu) ā n ji e, sharing some technical posts on public platforms, CSDN, GitHub, B stations, HUAWEI Developer Forum and other platforms. id on the whole platform is: Qi official account (q gu) ā n ji é), in addiUTF-8...
Posted by adamjnz on Mon, 27 Sep 2021 07:05:25 +0530
future and promise of C + +
future and promise are used to transfer data between different threads. Data transfer can also be completed by using pointers, but pointers are very dangerous because mutexes cannot prevent pointer access; Moreover, the data transmitted by pointer is fixed. If you change the data type, you alsoUTF-8...
Posted by linfidel on Mon, 27 Sep 2021 08:12:33 +0530
STL source code analysis of set, map, multiset and multimap of associative containers
set property All elements are automatically sorted according to the key value of the element. The key value of the set element is the real value, and the real value is the key value. Set cannot modify the set element value through the iterator. The set element value is its key value, which is rUTF-8...
Posted by maxf on Mon, 27 Sep 2021 16:17:54 +0530
Write C + + server by hand (36): tear code by hand -- non blocking recv, the cornerstone of high concurrency and high QPS technology [10000 words long text]
Navigation for this series of articles: Write C + + server by hand (0): column - Summary navigation [updating] Nothing is eternal and no scheme is omnipotent. Blocking mode and non blocking mode have their own advantages and disadvantages. Creating socket s is blocked by default. However, in thUTF-8...
Posted by luisluis on Mon, 27 Sep 2021 18:16:32 +0530
Depth analysis of C language format input and output
The so-called data input and output is from the perspective of computer. C language itself has no I/O statements, and all I/O is realized by functions. Standard library functions of C language A series of functions provided by the compiling system are stored in the system in the form of librarUTF-8...
Posted by RP on Wed, 29 Sep 2021 01:15:41 +0530
Summary of C + + common interview questions
Six design principles of design pattern Single responsibility principle: for a class, there should be only one reason for its change.Open and closed principle: software entities can be extended, but cannot be modified. That is, in the face of demand, the change of the program can be completed UTF-8...
Posted by Styles2304 on Thu, 30 Sep 2021 00:17:25 +0530
Easy to use motion control card: peripheral reading and writing and ZDevelop diagnosis
Today, the motion assistant will share with you the reading and writing of the hardware peripherals of ECI3808 of the motion control card and cooperate with ZDevelop diagnosis. 1, ECI3808 hardware introduction 1. Function introduction ECI3808 series control card supports up to 12 axis linear inUTF-8...
Posted by quark76 on Thu, 30 Sep 2021 05:08:47 +0530