alienware 51

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51 Single chip microcomputer learning notes "seven"--buzzer and relay

relay work, press the K1 relay stop work, and then press the relay again began to work, so repeat. The wiring is J2 connected P1.4,k1 P0.0.4 Program Source code/************************************** > File Name: Relay experiment > AUTHOR:PENGSHP > Mail: [email protected] G T date:2015 July 25 ***************************************/#include #define UCHAR unsigned char#define UINT unsigned intSbit relay=p1^4;//Relay bit declarationSbit k1=p0^0;//switch K1 bit declarationvoidDelay (UINT ms) {Uch

(reprint) Javaweb Learning Summary (51)--the principle of sending and receiving mail

(Decoder.decodebuffer (EmailSubject)," GBK " ): Emailplaincontent = new String (Decoder.decodebuffer (emailplaincontent), "GBK"), Emailhtmlcontent = n EW String (Decoder.decodebuffer (emailhtmlcontent), "GBK"); System.out.println ("Mail title:" +emailsubject); Sys Tem.out.println ("Mail content:" +emailplaincontent); System.out.println ("Message content with HTML tags:" +emailhtmlcontent); 36}37}The results of the operation are as follows:  This is the process of collecting mail using the POP3

"51" Java design pattern-analysis of factory design patterns

public Engine createEngine() { return new EngineB(); } @Override public Aircondition createAircondition() { return new AirconditionB(); } }Customer:[Java] View plain copy print? On code to view a snippet derived from my Code slicepublic class Customer {public static void Main (string[] args) {Production of BMW 320 series AccessoriesFactoryBMW320 factoryBMW320 = new FactoryBMW320 ();Factorybmw320.createengine ();Factorybmw320.createaircondition (); //生产宝马523系

Interview 51 Repeating numbers in the array

The title describes all the numbers in an array of length n in the range of 0 to n-1. Some of the numbers in the array are duplicates, but it is not known that several numbers are duplicates. I don't know how many times each number repeats. Please find any duplicate numbers in the array. For example, if you enter an array of length 7 {2,3,1,0,2,5,3}, then the corresponding output is a repeating number of 2 or 3.1 classSolution {2 Public:3 //Parameters:4 //numbers:an array of integers5

Reading Notes Objective c ++ Item 51 must comply with the Conventions when implementing new and delete.

Reading Notes Objective c ++ Item 51 must comply with the Conventions when implementing new and delete. Item 50 explains under what circumstances you may want to implement operator new and operator delete in your own version, but does not explain the conventions you need to follow when implementing it. It is not difficult to follow these rules, but some of them are not intuitive, so it is important to know what these rules are.1. Definitions of operat

51 Node 1051 --- maximum child matrix and, 51node1051 ---

51 Node 1051 --- maximum child matrix and, 51node1051 --- Question Link A matrix of M * N. Find a sub-matrix of this matrix. The sum of the elements of this Sub-matrix is the largest, and the maximum value is output. For example, the 3*3 matrix:-1 3-12-1 3-3 1 2 and the largest sub-matrix is: 3-1-1 31 2 Input Row 3: M and N, separated by spaces (2 Output The maximum value of the sum of outputs. If all numbers are negative, 0 is output. Input example

"Sword Point Offer": [51] Duplicate numbers in an array

appears in O (1). So we can find the duplicate numbers.Programme III:the time complexity is 0 (N) and does not assist space. The idea is this: sequentially scans each number of arrays. When scanning to a number labeled I, compare the number m is not equal to subscript I, such as, scan the next; if not, then compare it to the number labeled M, and if equal, find a return, and if not, exchange their values.As an example of an array of a[7]={2,3,1,0,2,5,3}, the analysis is as follows:The specific

Learn notes from scratch (day 51)--extended constructors

type.Reference type extension constructorsExample of defining constructors in an extension class:classPerson {varname:stringvarage:int func description ()-String {return "\ (name) is: \ (age)"} init (name:string, age:int) {self.name=name Self.age=Age }} Extension person {//defining extension types for the person classconvenience init (name:string) {//Convenient constructor functionSelf.init (Name:name, Age:8)}}let P1= Person (name:"Mary")//call the constructor of the two parameter, which is pro

Java Basic Knowledge Enhancement Collection Framework note 51:map collection of map sets function overview and testing

-mapNewHashmap(); - + //creating elements and adding elements -Map.put ("Deng Chao", "Sun Li"); +Map.put ("Huang Xiaoming", "Angelababy yang"); AMap.put ("Jay Chou", "Jolin Tsai")); atMap.put ("Jacky Lau Wei", "Yang Mi"); - - //V get (Object key): Gets the value based on the key -System.out.println ("Get:" + map.get ("Jay Chou"))); -System.out.println ("Get:" + map.get ("Zhou Jie"));//returns null -System.out.println ("----------------------"); in - //set toSetMap.key

Java Fundamentals Hardening 51: Running Javac reports Javac not internal or external commands (resolved)

1. Problem: Running Javac report Javac is not an internal or external command, but running Java, java-version normal?See if the following three environment variables are set correctly:(1) environment variable java_homeSet Java_home as the JDK installation path, as follows:(2) environment variable PATH(3) environment variable CLASSPATHSummarize:CLASSPATH.;%java_home%\lib; (Note: Front pastry, semicolon, back semicolon)Java_home D:\software\Android\JDK\install (note: Both front and rear are unsign

Python note (51)

Python note (51) Python class Class Mytest (object ):Nownum = 0Def _ init _ (self, value = 100 ):Self. nownum = valueDef inCrease (self ):Self. nownum + = 1Def deCrease (self ):Self. nownum-= 1Def toString (self ):Return "Current Value:" + str (self. nownum)Xx1 = Mytest ()Xx1.inCrease ()Print xx1.toString ()Xx1.inCrease ()Print xx1.toString ()Xx2 = Mytest (10)Xx2.inCrease ()Print xx2.toString ()Xx2.inCrease ()Print xx2.toString () ===================

Data Compression 1 (51), data compression 151

Data Compression 1 (51), data compression 151 1. compress the specified data in a servlet: PackageCn. hongxing. servlet; ImportJava. io. ByteArrayOutputStream; ImportJava. io. IOException; ImportJava. io. OutputStream; ImportJava. io. PrintWriter; ImportJava. io. StringReader; ImportJava.util.zip. GZIPOutputStream; ImportJavax. servlet. ServletException; ImportJavax. servlet. http. HttpServlet; ImportJavax. servlet. http. HttpServletRequest; ImportJav

Android --- 51 --- added multi-thread Socket communication and androidsocket Multithreading

Android --- 51 --- added multi-thread Socket communication and androidsocket Multithreading The front server and client only perform simple communication operations: After the server receives the Client ConnectionThe server outputs a string to the client, and the client exits after reading the Server String. In actual applications, the client may need to maintain long-time communication with the server, that is, the serverThe client needs to constantl

51. (turn) Android learning Route

the asynchronous operation in Android: How to use Handler, the basic concept of asynchronous tasks, and how to use Asynctask.Fifth stage: Android phone hardware management1, map and positioning technology: Introduction of GPS, how to use Locationmanager, how to add markers on Google Maps, querying methods for buildings near a place, and using Google Maps for Point-to-point navigation.2, the use of the Sensor method: direction, Acceleration (gravity), light, magnetic field, distance, temperature

51. Build the Product array

First, the topicGiven an array a[0,1,..., n-1], build an array b[0,1,..., n-1], where the elements in B b[i]=a[0]*a[1]*...*a[i-1]*a[i+1]*...*a[n-1]. You cannot use division.Second, the solution1 Importjava.util.ArrayList;2 Public classSolution {3 Public int[] Multiply (int[] A) {4 intLen =a.length;5 int[] B =New int[Len];6 if(Len! = 0){7B[0] = 1;8 //Calculate the lower triangle connection9 for(inti = 1; i )TenB[i] = b[i-1]

51 single chip microcomputer digital tube character H move from right to left

#include #defineUINT unsigned int#defineUchar unsigned charSFR p0m0=0x94; SFR p0m1=0x93; SFR p2m0=0x96; SFR p2m1=0x95;UINTCount;uchar Code leddata[]= { 0xC0,//"0" 0xf9,//"1" 0xa4,//"2" 0xb0,//"3" 0x99,//"4" 0x92,//"5" 0x82,//"6" 0xF8,//"7" 0x80,//"8" 0x90,//"9" 0x88,//"A" 0x83,//"B" 0xC6,//"C"

13-51 single-chip microcomputer ESP8266 Learning-at instruction (ESP8266 as a TCP client, connect a TCP server, use the Serial debugging assistant and the phone TCP debugging assistant test)

module, send the data before sending instructions, so that the module automatically forwardedAlthough it is set, but it seems not possible ....But it seems like a change of command.At+savetranslink=1, "192.168.4.2", 8080, "TCP"It seems to have been modified, and has been made to save the mode, the power outage will also save the settings,The new version of the AT command seems to be done specifically to save the settings inside the module, set up the next time the power automatically work, not

Writing high-quality code: 151 recommendations for improving Java Four (classes, objects, methods) 31-51

Tag: class refactoring static class improvement pre some SYS col JSONNo implementation code exists in the interfaceThe implementation code cannot exist in the interface (although it can be implemented, but if the implementation code is written in the interface, then the interface is bound to a possible change of factors, which results in the implementation is not document and reliable, can be discarded at any time, modified, reconstructed) Packagejsontest; Public classSalary { Public Static void

Linux command--51 lsof (GO)

txtCommand:Lsof-c Sshd-a-D txtOutput:[Email protected] soft]# lsof-c sshd-a-D txtCOMMAND PID USER FD TYPE DEVICE SIZE NODE NAMEsshd 2756 root txt REG 8,2 409488 1027867/usr/sbin/sshdsshd 24155 root txt REG 8,2 409488 1027867/usr/sbin/sshdsshd 24905 root txt REG 8,2 409488 1027867/usr/sbin/sshdsshd 24937 root txt REG 8,2 409488 1027867/usr/sbin/sshd[Email protected] soft]#[Email protected] soft]#Example 25: List all IPV4 network files that are open by processes with process number 1234Command:Ls

Effective C + +-----clause 51: You need to stick to the routine when writing new and delete

Operator new should contain an infinite loop in which to attempt to allocate memory, and if it does not meet the memory requirements, call New-handler. It should also be able to handle 0 bytes applications. The class-specific version should also handle "larger (error) applications than the correct size."operator delete should not do anything when a null pointer is received. The Class-specific version should also handle "larger (error) applications than the correct size."Effective C + +-----claus

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