cheddars 2 for 20

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 seriesProgram: # Include Output result: 32.660261 Press any key to continue

Server OSWindowsLinuxUnix:system (Bell Lab, Aix Solaris Hp_ux), BSD (NetBSD OpenBSD FreeBSD)Linux origins1984 Richard Stallman launched the GNU program, developed UNIX-based free software and tools to represent GCC VICreate GPL Public License1991 Linux Torvalds releases Linux and joins GNULinux Official website: www.kernel.orgThe Linux system is a combination of the kernel and GNU softwareCommon versions of LinuxSlackware:suse Enterprise Server, openSUSE DesktopDebian:ununtu,mintRedhat:redhat En

Method Oneimport functoolssum = 0for i in range(1,21):sum = sum + functools.reduce(lambda x,y: x*y, range(1, i+1))print(sum)Lambda x,y:x*y means: There is a function that accepts X, y two parameters to do multiplication.import functoolsMethod Twodef f(n):if n == 1:return 1else:return functools.reduce(lambda x,y: x*y, range(1, n+1)) + f(n-1)print(f(20))Method Threedef plus(n):if n == 1:return 1else:return reduce(lambda x,y: x*y, range(1,n+1)) + plus(n-

Starting 3 threads, thread 1 printing 1 to 5, thread 2 printing 5 to 10, thread 3 printing 11 to 15, then thread 1 printing 16 to 20, and so on ... Print until 30 public class Mainthread {private static int num;//current record number private static final int threadnum =3;//open Task thread count private static final int loopnum = number of 2;//threadnum thr

/***//** * 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 void main (string [] ARGs )...{ /**//* * Not

# 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 this series

This article is from my translation of the Infoq Chinese station, the original address is: Http://www.infoq.com/cn/news/2015/06/Building-Distributed-SystemsThis June 12, the jetty project released the 9.3 version of the flagship open source embedded application server, which was also the 20 anniversary of the project. The main features of this release include increased support for the HTTP/2 server (with th

This article is from my translation of the Infoq Chinese station, the original address is: Http://www.infoq.com/cn/news/2015/06/Building-Distributed-SystemsJune 12 this year. The jetty project unveiled the 9.3 version of the flagship open source embedded application server, which is also the 20-year anniversary of the project. The main features of this announcement include the addition of support for HTTP/2

After a fraction of the numerator = numerator of the previous fraction + denominator, the denominator of the next fraction = the numerator of the previous fraction, the cycle is 20 times the result. Note that the numerator is a and the denominator is B, although a = a + B,But at this point A has become a+b, so to re-assign the value of the time, it is (a+b)-B to be equal to the original denominator B, so re-assignment should be written as a-aMethod On

Write a program and use the while statement to calculate 1 + 1/2! + 1/3 !...... + 1/20 !, And output the computing results in the control of Taishan. Requirement 1 + 1/2! + 1/3 !...... + 1/20 !, In fact, it is to calculate 1 + 1*1/2 + 1*1/

If the values of the struct field are in the order of 1, 2, 3, 11, 12, 20, and 21, if we want to sort this field, it is generally written in this way. SQL statement: Select * From xs_jbxx order by jyjxsbmBut the results may not be satisfactory: 1, 11, 12, 2, 20, 21, 3, 4 The results we want are: 1,

IOS Study Notes 20-map (2) MapKit framework1. Introduction to map development Since iOS6.0, map data is no longer driven by Google, but switched to its own map. Of course, its data in China isAMAPProvided.There are three main ways to develop maps in iOS: MapKitThe framework is used for map development. This method can be used to precisely control maps and call the map application provided by Apple. It is ma

Drink soda, 1 bottles of soda 1 yuan, 2 empty bottles can change a bottle of soda, to 20 yuan, how much soda can. Programmatic implementation. The whole idea : a recursive way to achieve, each recursive means that this time can buy soda bottle number (M). First of all, to determine whether M is able to fully redeem (m even), in two cases: If can (M is even), again m/2