# 172 20 20 1

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### Java gets a random number between 1-20, a total of 20, requires that cannot be repeated to obtain a random number between 1-20, a total of 10, the requirement cannot be heavy

PackageCom.swift;ImportJava.util.HashSet;ImportJava.util.Random;ImportJava.util.Set; Public classSuijishu_test { Public Static voidMain (string[] args) {/** Get a random number between 1-20, total 20, requires no weight*/Random ran=NewRandom (); SetNewHashset(); intnum; for(inti = 0; I ) {num= Ran.nextint (20) +

### Java Study Notes 20 --- adding internal classes to member Internal classes (1), Study Notes 20 ---

Java Study Notes 20 --- adding internal classes to member Internal classes (1), Study Notes 20 --- In the previous article, note 19 briefly introduced the internal class, local internal class, and anonymous internal class of the member, and added some content to the internal class of the member. There are mainly the following six points:

### The 4th chapter writes the Java program, uses the while loop statement to calculate the sum of 1+1/2!+1/3!+...+1/20!

Package four;public class Fouronetwo {public static void Main (String args[]) {Double sum = 0,a = 1;int i = 1;while (I {sum = sum+a;i = i+1;A = A * (1.0/i);}SYSTEM.OUT.PRINTLN (sum);}}Explanation: When I=1, Sum=1, i=2, a=1* (

### 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

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 fi

### Java uses the while loop to calculate 1 + 1/2! + 1/3 !...... + 1/20!

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! +

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### Use the do-while statement to calculate 1 + 1/2 + 1/3 +... + 1/20 results (tasks on the computer in week 10)

/** Copyright (c) 2011, School of Computer Science, Yantai University * All Rights Reserved. * file name: test. CPP * Author: Fan Lulu * Completion Date: July 15, October 29, 2012 * version number: V1.0 ** input Description: none * Problem description: computing and output 1 + 1/2 + 1/3 +... + 1/

### Java uses while loop to calculate 1+1/2!+1/3!...... +1/20!

1 Public Static voidMain (string[] args) {2 Doublen = 1, sum = 0;3 while(N ) {4sum + = 1/factorial (n);5n++;6 }7 System.out.println (sum);8 9 }Ten One Static DoubleFactorial (Doublem) { A if(m = = 1 | | m = = 0) { - return1; -}Else { the return(M * Fact

### Using a while loop to compute 1+1/2!+1/3!+...+1/20!

Package practice; /* Use while loop to compute 1+1/2!+1/3!+...+1/20! A is used to store one of the first n factorial points sum is used to accumulate and/or public class Whiledemo {The public static void main (string[] args) {/*i=i+1

### C: Ask for 1/n! from 1 to 20 and

Program:#include stdio. h >void Main (){ Double s=0,t=1; double N; for (n=1;n20;n+ +){T = T *(1/N); /// Request 1/(n!) s = s +T; // add items to the cumulative }printf ("%lf\n", s);}Operation Result:1.718282This article is from the "Rock Owl" blog, please be sure to keep this source http://10742111.blog.51cto

### "Learning God-rhel7" 1-20-1-the operation of the kernel module

fuseFuseiso-20070708-15.el7.x86_64Gvfs-fuse-1.16.4-8.el7.x86_64Fuse-libs-2.9.2-5.el7.x86_64Fuse-2.9.2-5.el7.x86_64[[Email protected] ~] #modprobe NTFSCompile and install ntfs-3g source package[Email protected] ~]# TARZXVF ntfs-3g-2011.1.15.tgz[Email protected] ~]# cdntfs-3g-2011.1.15/[[email protected] ~]#./configure make make installImport USB flash Drive650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M02/78/18/wKioL1Z1dP_zWXXzAAGjfem6Ztc416.png "title="

### 1-20 of two numbers and told a, the product told B,a said do not know how much, B also said do not know, at this time a said I know, B said I also know, please guess this two number and how much

1~20 Choose 2 numbers and tell b the two numbers and the product of the 2 numbers. Then ask a know how many of these two numbers are. A said do not know, ask B to know the two number is what? B also said not to know. Then a suddenly reasoned out how many of these two numbers were, and told B he knew the answer.B then also know how many of these two numbers are. May I ask how they reasoned, and what are the

### The JNI test-java calls the C algorithm and returns the 1 to 20 factorial of the Java call and

One, Java side:Define the native method, ' public native long factorial (int n); ', the method is implemented in C + +, computes ' 1 to 20 factorial and ', the argument ' int n ' is the factorial of the first n and (here is 20). Returns the result of the calculation, and return to the Java call.The code is:1 Public cl

### "Python3 exercises 020" for 1+2!+3!+...+20! and

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

### SQL Server programming is a must--(1-20-point summary)

needs to be behind the WHERE clause, otherwise an error occursSELECT Prod_name, Prod_priceFrom ProductsWHERE Prod_price = 2.50ORDER by Prod_name DESC--18. Mismatch check: List all products not manufactured by Vendor 1003SELECT vend_id, Prod_nameFrom ProductsWHERE vend_id --where vend_id! = 1003;--19. Scope Check: Retrieve all products priced between \$5 and \$10SELECT Prod_name, Prod_priceFrom ProductsWHERE Prod_price between 5 and 10;--where Prod_price >= 5 and Prod_price --

### C language-drink soda, 1 bottles of soda 1 yuan, 2 empty bottles can change a bottle of soda, to 20 yuan, how much soda can? __c language

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), agai

### Weekly Report: From January 1, October 29-20, 2018 to January 1, November 2

Weekly Report: From January 1, October 29-20, 2018 to January 1, November 2 Monday 10.29 Debugging and testing of client logon. The addition of subject database fields solves the problem of deleting the question library. FTP configuration, permission configuration research, data query, and experiment. Communicate with Xia to clarify the development tasks o

### Iv. Shell Programming Exercises (1-20)

";If the file is a directory, it is displayed as "directory";If the file is a linked file, it is displayed as "symbolic file";Otherwise, it is displayed as "unknown type."#!/bin/bashif[!-e\$1];thenecho "FILENBSP;NOTNBSP;EXITNBSP;." exit5fiif[-L\$1];thenecho "Symbolicfile." elif[-d\$1];thenecho "directory." elif[-f\$1];the

### Two ways to find 1 to 20 squares in Python

#1. Using the list derivation formula>>> [x**2 forXinchRange (1,21)][1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361, 400]#using lambda>>> [(Lambdax:x**2) (x) forXinchRange (1,21)][1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361, 400]#2. Using the Map function>>>defcube (x):returnX**2>>> list (Ma

### JavaScript Instance Tutorial (20) using HoTMetaL (1)

invoked using toolbar buttons and other means, which we'll cover later in the tutorial. All hotmetal macros should be stored in a single file, such as HOTMETAL.MCR. This file is in the macro folder Softquad\hotmetal PRO 6.0. If you have installed HoTMetaL Pro 6.0 under the default directory C disk, then your macro file is in C:\Program files\softquad\hotmetal Pro 6.0\MACROS\HOTMETAL.MCR. Note here that the file extension is. MCR, but it cannot be edited in a hotmetal environment. You can use an

### Install SNMP cannot install dependency package Net-snmp-libs = 1:5.3.2.2-20.el5

Problem: Cannot install dependent package Net-snmp-libs = 1:5.3.2.2-20.el5Cause: The system already exists Net-snmp-libs-5.3.2.2-25.el5_11Workaround : First remove the existing package rpm-e--allmatches--nodeps net-snmp-libs-5.3.2.2-25.el5_11Esolving Dependencies--Running Transaction check---> Package net-snmp.x86_64 1:5.3.2.2-

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