Programmer Think

preface After watching the video of the dark horse during this period, summarize from the case and review the old to know the new. 1, System requirements Address book is a tool that can record the information of relatives and friends. The functions to be realized in the system are as follows: Add contact: add a new person to t ...

1, Function introduction This is the third article on rewriting some functions of C language string.c. The following functions have been rewritten in the previous two articles: strdup String copy strchr Character lookup function (Start from scratch) strrchr Character lookup function(Start from the tail) strcat strncat String splicing funct ...

1. About design patterns Design pattern Some writing methods of the code (these writing methods are different from the conventional writing methods), so that the program written by the code is flexible and easy to maintain, but others take over and read the code is very painful.The code written with the concept of "design patter ...

Problem description 1) A city held a speech_contest, in which 24 people participated. There are three rounds in the competition. The first two rounds are the knockout and the third round is the final. 2) Competition mode: group competition, with 6 people in each group; Players should be randomly divided into groups for competition each tim ...

[preface]: the knowledge points supplemented by circular sentences are very important. Iron juice should be recorded with snacks. 1, while statement while statement while((expression) { Loop statement; } [knocking on the blackboard]: the execution times of the conditional expression are 1 more than that of the loop body. break and ...

1,unique_lock replaces lock_guard unique_lock Is a class template. In work, lock is generally used_ Guard (recommended); lock_guard replaces lock() and unlock() of mutex;unique_lock is better than lock_ The guard is much more flexible; The efficiency is a little poor, and the memory takes up a little more.In normal use, there is no d ...

Lab0- C++ Primer 💡 unique_ptr, matrix multiplication, gdb, etc. Code download Follow the document steps under the project: // 1. Create a new warehouse, bus private // 2. clone cmu db remote code to local git clone --bare https://github.com/cmu-db/bustub.git bustub-public cd bustub-public // 3. mirror to the remote warehouse you just ...

A. Linear Keyboard General idea of the topic The first line gives you a string with a length of 26, representing the order of 26 letters, and the distance between adjacent letters is 1. The second line gives you a string and asks how long it took to walk from beginning to end. Problem solving ideas Just enumerate. AC code #inclu ...

Review of Algorithmic Design and Analysis Test Theories 1. Basic concepts and properties of algorithms and their relations and differences with programs Algorithms: Algorithms refer to a series of calculation steps to solve a problem, which is an accurate and complete description of the solution. Basic properties of the algorithm: Input: T ...

(it's a little small. Take your time and you'll get something) (1) First we have to understand, what is strong connectivity? If a path from u to v can be found in any two points u and v in the vertex subset of a directed graph, the subset is called strongly connected (2) Second, we have to understand what is a strongly connected component? If ...