C extracts a substring from a string

Write a function subject          Please write a function that extracts a string from a string. The prototype of the function is as follows: int substr(char dst[],char src[],int start,int len); The task of the function is to copy a maximum of len non NUL characters to the dst array by offsetting the start position o ...

Posted on Tue, 09 Nov 2021 04:23:43 -0500 by mimintweak

The most comprehensive and all-round explanation of design mode from introduction to mastery (updat ing)

Design pattern elaboration 1, Course guidance and introduction 1.1 navigation in this chapter This chapter will explain UML through the following six aspects: definition, characteristics, classification, class diagram, sequence diagram and memory skillsURL definition: Unified Modeling Language (UML)Non patent third generation modeling and ...

Posted on Fri, 05 Nov 2021 16:50:43 -0400 by garethdown

[learning notes of algorithm competition] decision monotonicity and slope optimization - super useful detailed explanation of DP

title: Decision monotonicity and slope optimization date : 2021-10-8 Tags: ACM, dynamic programming author : Linno Pre knowledge Quadrilateral inequality definition if letter number w ( ...

Posted on Thu, 28 Oct 2021 14:28:39 -0400 by illushinz

Go deep into the smallest storage unit of InnoDB storage engine and analyze MySQL. In fact, indexing is not difficult

1, Foreword Index can be said to be a necessary skill point for every engineer. Understanding the principle of index is very important for writing high-quality SQL. Today we will understand the principle of index from 0 to 1. I believe you will have a deeper understanding not only of index, but also of the "page" of the smallest sto ...

Posted on Mon, 25 Oct 2021 07:57:39 -0400 by zz50

Starting from an actual software fault, this paper discusses the handling skills that are difficult to reproduce the fault stably in the field of enterprise management software

catalogue Some manifestations of intractable faults in the field of enterprise management software 1. Complex processes are required to reproduce 2. Faults span multiple modules of enterprise management software 3. The fault can only reappear in the customer's production system 4. The fault can only reappear in the background operation mod ...

Posted on Sat, 23 Oct 2021 18:05:27 -0400 by rainerpl

C++ Initial Stage - Classes and Objects

Catalog Class Definition 2. Access qualifiers and encapsulation of classes 3. Scope of Classes Fourth, instantiation of classes Five, class object size   Six, this pointer C focuses on the process, analyses the steps to solve the problem, and gradually solves the problem through function calls. C++ focuses on objects, splittin ...

Posted on Fri, 22 Oct 2021 12:42:11 -0400 by superpimp

40000 words [Python advanced programming] nanny teaching, do you feel hard to advance? That's because you haven't learned this part well!

When chatting with a young man a few days ago, he found a problem. He learned Python from scratch. After learning the basics of lists, dictionaries and functions, he began to learn advanced in the direction of crawlers. As a result, it took more than a month to learn nothing, but he couldn't do anything. In fact, the main reason for this pro ...

Posted on Sun, 17 Oct 2021 22:12:32 -0400 by Penelope

1184: explicit random number (one book pass) (comparison between merging and bucket sorting)

1184: explicit random number Time limit: 1000 ms         Memory limit: 65536 KB Number of submissions: 19979     Number of passes: 12535 [Title Description] Mingming wants to invite some students to do a questionnaire survey in the school. For the objectivity of the experiment, he first uses ...

Posted on Sun, 17 Oct 2021 20:10:02 -0400 by siesmith

Intersection of two single linked lists in java

[title] Given two possibly looped and possibly acyclic single linked lists, head nodes head1 and head2, please implement a function, If the two linked lists intersect, the first node of the intersection is returned. If they do not intersect, null is returned [requirements] If the total length of the two linked lists is N, the time complexity is ...

Posted on Thu, 14 Oct 2021 22:34:00 -0400 by Weirdan

Geek Navigation (51, STM32, Smart Car Project, ESP8266, Remote Control System)

Article Records: Geek Navigation This project is an embedded project in the Geek Navigation Tutorial, a remote control system for smart cars Code is open source (end of article). The design system mainly includes (as shown in the diagram) Car owners (51 and STM32)Hardware remote control (master STM32)Mobile phone remote control software (And ...

Posted on Tue, 12 Oct 2021 12:19:51 -0400 by danesc