C++

Here is a producer consumer question to introduce the use of condition_variable. When shared data between threads changes, it is possible to notify other threads through condition_variable. Consumers wait until the producer notifies them that the

Responsibility Chain mode (Chain of Responsibility): Enables multiple objects to have the opportunity to process requests, thus avoiding the coupling between the sender and receiver of the request. Link the object to a chain and pass the request

Public interface idataaccess { Virtual void adddata (); }   Public sqlmethord: idataaccess { Void adddata () { System. Windows. Form. messagebos. Show ("sqlmethord "); } }   Public accessmethord: idataaccess { Void adddata () {

Protected void page_load (Object sender, eventargs E){ Stringbuilder mystringbuilder = new stringbuilder (); Webrequest request = webrequest. Create ("http://www.dahuatech.com/news.aspx? Type = 1002 "); Webresponse response = request. getresponse

Encryption static byte[] EncryptBytes_Aes(byte[] plainText, byte[] Key, byte[] IV) { // Check arguments. if (plainText == null || plainText.Length Decryption static byte[] DecryptBytes_Aes(byte[] cipherText, byte[]

1. List. Sort (generic comparison) Method   The parameter of this method is of the comparison type and is actually a delegate containing two parameters. Therefore, to use this method, we only need to define one delegate, and both of them are of the

Indexer is a new type of class member introduced by C #. It allows objects in the class to be referenced as conveniently and intuitively as arrays. The indexer is very similar to an attribute, but the indexer can have a parameter list and can only

/** @ Author Cody * @ date 2014-08-12 * @ Description * // * # include void * MMAP (void * ADDR, size_t Len, int Prot, int flag, int filedes, off_t off); int munmap (void * ADDR, size_t Len ); */# include # include # include void mmapfile ()

1. Brief description of the hash table (hashtable) In. in the. NET Framework, hashtable is system. A container provided by the collections namespace is used to process and present key-value pairs similar to the keyValue. The key is usually used for

Ultraviolet A 465 -- Overflow (atof function) Overflow Write a program that reads an expression consisting of two non-negative integer and an operator. determine if either integer or the result of the expression is too large

Hdu 3221 Brute-force Algorithm)   One night I came up with such a question .. Mark.   Given such a program, I asked how many times the funny function called. Let's define an array as follows: f [1] = a, f [2] = B, f [3] = f [2] * f [3] ...... f [n] =

Leetcode -- Generate Parentheses Problem Description: Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses. For example, given n = 3, a solution set is: "((()))", "(()())", "(())()", "()(())", "()()(

MappedByteBuffer: Random Access to cached files and RandomAccessFile Speaking of High-speed cache storage and processing of read/write files, you have to say MappedByteBuffer. After reading many articles, write your own summary. Here we will first

Hdu 4763 Theme Section (simple KMP) Theme Section Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission (s): 1184 Accepted Submission (s): 621 Problem DescriptionIt's time for music! A lot of popular

POJ 1177 Picture (scanning line for perimeter) It is similar to finding the correct area, but it is not well handled when the Scanning direction is the same. If the scanning line is discretization twice, this problem can be solved, however, this is

UVALive 5029 Encoded Barcodes Encoded Barcodes Time Limit:3000 MS Memory Limit:0 KB 64bit IO Format:% Lld & % lluSubmit Status Practice UVALive 5029 Description All the big mallneed a powerful system for the products retrieval. Now you are employed

Sha-10003 Cutting Sticks (recurrence) Question: FIG (recurrence) The length of a wooden stick is l. Now I want to saw the wooden stick and give n saw points. How can I minimize the overhead. For example, if a 10-bit wooden stick is sawing at 2 4 7,

Poj 1781 In Danger (Joseph's ring, finding Rules)   Joseph Ring template, each time count to 2 people out of the ring. However, we can directly find that TLE and n are too large. The answer is related to n. When n is the power of 2, the answer is 1.

Four transformation operators in C ++ Before introducing the four transformation operators in C ++ in detail, let's talk about the disadvantages of the old Transformation: ① It almost allows converting any type to any other type, which is very poor.

HDU 4932 greedy Miaomiao's Geometry Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission (s): 191 Accepted Submission (s): 38 Problem DescriptionThere are N point on X-axis. Miaomiao wowould like to cover