# 13 3 ultrabook

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### Obtain the fractional sequence: 2/1, 3/2, 5/3, 8/5, 13/8, 21/13... The sum of the first 20 items

/***//** * Fractionserial. Java * There is a fractional sequence: 2/1, 3/2, 5/3, 8/5, 13/8, 21/13... * Calculate the sum of the first 20 items of the series. * @ Author Deng Chao (codingmouse) * @ Version 0.2 * Development/test environment: jdk1.6 + eclipse SDK 3.3.2 */ Public class fractionserial ...{ Public static

### There is a fractional sequence: 2/1, 3/2, 5/3, 8/5, 13/8, 21/13... find the sum of the first 20 items of this series

# Include }/* The numerator behind the score is equal to the numerator plus the denominator of the previous score, and the denominator of the subsequent score is equal to the numerator with the previous score */ There is a fractional sequence: 2/1, 3/2, 5/3, 8/5, 13/8, 21/13... find the sum of the first 20 items of

### Mylinux Cookbook No.3 2015/3/13

secondary numbers by character device and block device, linked to device/sys/device is a global device architecture, containing all the discovered physical devices registered on various buses, a hierarchical representation model of all the devices in the system, and the most important directory structure for/sys file system management devices./SYS/FS describes all file systems in the system/sys/kernel stores all the adjustable parameters in the kernel/tmp temp file/USR User program storage dire

### 1, 2, 3, 5, 7, 8, 10, 11, 12, 13, 14, 15, 16, 21, 22-"1 ~ 3, 5, 7 ~ 8, 10 ~ 16,21 ~ 22

In order to omit the space and make it visible to the operator who manually fills in the paper, the volume number on the card of the materials shelf is determined to be classified and sorted, as shown in A-3, A-4, A-5, A-8 forming A-3 ~ 5, 8, etc. The following code uses a few auxiliary list /// /// Similar to 1, 2, 3, 5, 7, 8, 10, 11, 12,

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### There is a fractional sequence of 2/1 + 3/2 + 5/3 + 8/5 + 13/8 +... Find the sum of the first 20 items of the series.

There is a fractional sequence of 2/1 + 3/2 + 5/3 + 8/5 + 13/8 +... Find the sum of the first 20 items of the series.Program: # Include Output result: 32.660261 Press any key to continue

### C language: There is a score sequence: 2/1 + 3/2 + 5/3 + 8/5 + 13/8 +... Find the sum of the first 20 items in this series

C language: There is a score sequence: 2/1 + 3/2 + 5/3 + 8/5 + 13/8 +... Find the sum of the first 20 items in this seriesProgram: # Include Output result: 32.660261 Press any key to continue

### [9-13] Shell Series 3--branching structure if and case statements

=" Wkiol1x_uulwyqasaalmpj7etwo772.bmp "/>Code implementation 12345 if [Expression];thenStatement1Statement2......Fi Example: If the current year is 2015, show "You have to study hard!"Note that there are spaces before and after the [expression] expression! Otherwise syntax error 1 2 3 4 5 #!/bin/bash if [\$ (date+%y) -eq 2015 ];then echo "youshouldstudyhard!" Fi

### mysql-Learning -13-20170621-mysql Backup Recovery-xtrabackup-3

mysql-Learning -13-20170621-mysql Backup Recovery-xtrabackup-3MariaDB Mysqlbinlog 10.2 Belt"Admin" Wu Bingxi (82565387) 20:35:31Maxscale Proxy: Support semi-synchronousThe two tools under Binlog Server can support Binlog rollback BINLOG ServerMysqlbinlog_sqlHttps://github.com/danfengcao/binlog2sql"Admin" Wu Bingxi (82565387) 20:36:25Https://github.com/danfengcao/binlog2sqlMysqlbinlog_sql"Admin" Wu Bingxi (82565387) 20:38:15shell> git clone https://git

### Java EE 13 specification (3)-java Servlet

-mm-dd"). Parse (senddate); }catch (Exception e) {e.printstacktrace (); } System.out.println ("sbegindate=" + sbegindate); System.out.println ("senddate=" + Senddate);}} Instance parsing:HTML code:Xmlservlet life cycleThe whole process of life, loading servlets and instantiating, initializing INIT, processing requests, exiting the service.Note: The servlet is instantiated only once, and the Init method is only executed once, and the servlet is not thread-safe. Finally, there is a not

### Silverlight &amp; Blend Animation Design Series 13:3 angular function (trigonometry) animation falling Snowflakes (falling snow)

Collection--Initialize 250 snowflake objects and animate with colleaguesFlake = new listSnowflake Coordinate CollectionXystart = new listOpacity CollectionOpacityvalue = new listfor (int i = 0; i {Different starting and ending coordinatesPoint newpoint = new Point (Rand.next ((int) layoutroot.width), Rand.next ((int) layoutroot.height));Xystart.add (Newpoint);Different transparency valuesOpacityvalue.add (Rand.nextdouble ());}Initflakes ();snowfall.completed + = new EventHandler (snowfall_compl

### Python 3.x Learning note 13 (Network programming socket)

visitPracticeClientImportsocketclient= Socket.socket ()#declares the socket type and generates the socket connection object at the same timeClient.connect (('localhost', 6565)) Client.send (b'Holle world!')#transfer data can only be in byte typedata = CLIENT.RECV (1024)#One acceptable amount is 1024x768.Print('recv:', data) client.close ()Service sideImport= socket.socket () server.bind('localhost', 6565)Server.listen () # MonitorCONN,ADDR = server.accept () # wait= Conn

### Entity Framework 6 Recipes 2nd Edition (13-3)---read-only access get entities

get doctors and companies and to keep them from being added to the context object, we link the Asnotracking method to the query that gets the entity, as in Listing 13-9.Listing 13-9. Doing a simple Query Using the asnotracking Methodusing (var context = new Recipe3context ()){var company = new company {Name = "Paola Heart Center"};var Doc1 = new Doctor {Name = "Jill Mathers", company = company};var doc2 =

### Reverse BASICS (13) JAVA (3)

Reverse BASICS (13) JAVA (3)In the simple example of the 54.13 array 54.13.1, we first create an array with an integer of 10 and initialize it. public static void main(String[] args){ int a[]=new int[10]; for (int i=0; i Public static void main (java. lang. string []); flags: ACC_PUBLIC, ACC_STATICCode: stack = 3, locals =

### The characteristics of the number of "fun arithmetic" that can be divisible by 2, 3, 5, 7, 9, 11, 13

number is 383, the difference between the two numbers is: 383-357=26,26 can be divisible by 13, therefore, 383357 must be divisible by 13.This method also applies to judging whether a number can be divisible by 7 or 11. such as: 283679 of the last three digits is 679, the last three digits of the previous number is composed of 283,679-283=396,396 can be divisible by 11, therefore, 283679 must be divisible

### Expert one-on-one Oracle chapter 13 materialized view Reading Notes (3)

data and connection compatibility)-> group compatibility-> aggregation compatibility 2. How to ensure that materialized views can be used?Here, we only talk about three methods to help you use the query rewrite function of the Materialized View:1) constraints;2) dimension;3) describe complex relationships-data Hierarchies;The following are examples of the above three methods:1) constraints:SQL> Create Table EMP as select * from Scott. EMP;Table creat

### Learning PHP while logging-(13) Object-Oriented Programming 3

: This article mainly introduces how to learn PHP-(13) Object-Oriented Programming 3 while logging. For more information about PHP tutorials, see. 2.3 Member methods (functions) The member method I understand is to execute some specific functions of this class, or what this class can do. It is no different from functions outside the class, but it is declared in the class. You need to use the class object

### Accumulate [C #]-1, 1, 2, 3, 5, 8, 13, 21 .... Calculate 30th bits (recursion )!

Question: Uses Recursion to calculate 1, 1, 2, 3, 5, 8, 13, and 21 ...... 30th bits! Effect: Code: 1 Protected Void Button#click ( Object Sender, eventargs E) 2 { 3 If (Tb1.text! = "" Tb1.text! = Null ) 4 { 5 If (! Isnum (tb1.text )) 6 { 7 Response. Write ( " " ); 8 } 9 Else 10 {

### 3. Resource Management (Terms: 13-17)

Clause 13: manage resources by object. A.Resource leakage: #include (No destructor is called, and resources are not released in the heap) B.Use objects to manage resources: Template (Use an object to call the destructor to release resources through delete) 3. Resource Management (Terms: 13-17)

### 2018-3-22 13 weeks 4 lessons MySQL common operation (UP)

database version select version ();• View database status show status;(data not all shown)• View each parameter show variables; Show variables like ' max_connect% ';Show variables;(Too many parameters)• Modify parameter set global max_connect_errors=1000;If you want to permanently take effect, you need to exit to SHELL,VIM/ETC/MY.CNF, define max_connect_errors=1000;• View queue show processlist; Show full processlist;If there are errors, please correct, learn from each other and progress togeth

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