calc spreadsheet

Last night, I spent a lot of time studying inside the binary tree application to solve the problem of calculation expressions, has been not understood, mainly feel is not their own fault, and lazy, do not want to knock the code to the computer to see, the result of a lot of wasted time. So still remind everyone, code this kind of thing, what a lot of look, think he was wrong to knock himself to the computer to see! In fact, too much, is missing something, resulting in the original code in the pa

" pointer explicitly. But sometimes this is also very useful. 1 If your constructor or class member function has a parameter and a member variable with the same name, you can use this to avoid ambiguity Class something { private: int ndata; Public: Something (int ndata) { this->ndata = ndata; } ; 2 Sometimes the function returns "*this" can be very useful. "*this" is reference to the object. This feature allows us to string functions together so that the output of o

the program conforms to the Richter scale substitution principle, otherwise it violates the Richter scale substitution principle. Let's take a look at a case where the Richter replacement principle is violated under what circumstances. A simple inheritance structure, in subclasses, overrides the method of the parent class of the Calc method. Parent Class Calc: [Java] view plain copy package cn.desig

1 PackageTest;2 ImportJava.util.Scanner;3 /**4 * Design a calculator, realize multi-line input, and output the result separately5 * Input:6 * 4/2+5+9*7-97 * 3*2+8/2-7+28 * 3+8*4-5+3+19 * 9/4/2+7-6-1Ten * Output: One * A * 5 - * - * @authorlitaiqing the * - */ - Public classTest { - Public Static voidMain (string[] args) { +Scanner Scanner =NewScanner (system.in); - while(Scanner.hasnext ()) { +String in =scanner.nextline (); A System.out.println (

Public classCalc { Public Long? Number {Get;Set; } Public LongNumber1 {Get;Set; } Public LongNumber2 {Get;Set; } }varCalc =Newcalc (); Calc. Number1= -; Calc. Number2= -;varresult = Calc. Number + Calc. Number1+calc. Number2;ReSharper also has no hint that the code has a p

result. This is a bit like binary tree traversal, but our data structure (Program) is more complex than binary tree traversal. Pattern Matching and Recursion: A simple calculator Since the calculator is the simplest interpreter, why don't we start with the calculator? The following is a calculator that can calculate four arithmetic expressions. These expressions can be nested at will, for example, '(* (+ 1 2) (+ 3 4 )). I want to explain the pattern matching and Recursion principles in this sim

does not. 3) Not modified and out of date The file is not modified, but the file in the version library has been modified, and the local file is out of date. The SVN commit command does not do anything. SVN update adds the latest modification to the work copy. 4) Locally modified and outdated This file has been modified in the working directory, and the files in the version Library have been modified since the last update, that is, the local working copy is out of date. In this case, if there i

First, exception handlingIn the process of running the program, you will always encounter a variety of errors. Program An error stopped running, then we can not let the program stop running it, this time we need to catch the exception, by catching the exception, we do the corresponding processing.Let's begin by writing a function that implements the division operation. 1234567891011 def Calc(a,b): return a/b Print(

First, exception handlingIn the process of running the program, you will always encounter a variety of errors. Program An error stopped running, then we can not let the program stop running it, this time we need to catch the exception, by catching the exception, we do the corresponding processing.Let's begin by writing a function that implements the division operation. 123456789101112 def Calc(a,b): return a/b Print(

, why the output is not the same? at the time of definition, the value of the default parameter L is computed, that is, pointing to [],l is also a variable, and if the content of L is changed (pointing) at each invocation, the default parameter naturally changes. So: the default parameter must point to the immutable object! The above code can be modified with none:def Testa (l=None): if is none: L=[] l.append ( ' END ' ) return L(c) Variable parametersVariable parameter refers to

object is not changed, the simultaneous reading of objects in a multitasking environment does not require locking, while reading a little bit of a problem. When we are writing a program, if we can design a constant object, we try to design it as an immutable object.variable Parameters :The number of arguments is not sure, you can put a,b,c ... Passed in as a list or tuple, the function is defined as follows:def calc (numbers):For I in numbers:In the

-color:transparent; Background-image:linear-gradient ( To Bottombottom, RGBA (white, 0.8), RGBA (white, 0.8) $LH, RGBA (white, 0.6) $LH, RGBA (white, 0.6) $lh *2, RGBA (white, 0.4) $lh *2, RGBA (white, 0.4) $lh *3, RGBA (white, 0.2) $lh *3, RGBA (white, 0.2)); } It will be more difficult if we are to manipulate to the last arbitrary line. In that case, we need the Ribbon to start all the way down to the bottom line, and luckily we can do it with

Project Structure diagram:　　　　　　The files in the App_start folder are created by vs itself, where the Ninjectwebcommon class does not exist at the beginning of creation. It will be mentioned again later!Add a home controller. The code is as follows:usingEssentialtools.models;usingNinject;usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingsystem.web;usingSYSTEM.WEB.MVC;namespaceessentialtools.controllers{ Public classHomecontroller:controller {PrivateIvaluecalculator

can be defined as follows: def calc (numbers):sum = 0For N in numbers:sum = SUM + N * nreturn sum But when you call, you need to assemble a list or tuple first: Calc ([1, 2, 3])14Calc ((1, 3, 5, 7))84 If you take advantage of variable parameters, the way you call a function can be simplified as follows: Calc (1, 2, 3)14Calc (1, 3, 5, 7)84 So, we change the param

Microsoft Excel spreadsheets are widely used in today's business environment. Although Excel can read and display delimited files, the. xls proprietary format provides some other expressive features, including font formatting and multiple worksheet spreadsheets. Many commercial and open source tools provide the ability to generate reports that can be read by Excel. For example, you can use Oracle Reports to generate a spreadsheet, or use Sql*plus to

1. Write in the previous words First of all, the first translation of the document, flawed, I hope you give some advice and guidance. Phpexcel said: Phpexcel is based on the OPENXML standard, using PHP to read and write and create Excel file spreadsheet engine. The project provides a series of classes for the PHP programming language that allow you to read and write spreadsheets in different file formats, such as Excel (BIFF). xls, Excel (Of

Because of special circumstances, we can't edit the relevant table in Word, what can we do? Don't worry, we can insert a spreadsheet in Word to do the same thing. 　Word2010 Insert an Excel spreadsheet. Open the Word2010 document, and click the Insert tab. In table, click the Table button. In the menu, select Excel spreadsheet. Enter data in an E

similar to the batch file. A professional MAKEFILE file usually contains additional targets such as make install and make check.The examples involved in this example are simple enough that makefile is not required at all, but it is necessary to use makefile for any larger program. (5) link external Libraries A library is a collection of pre-compiled object files that can be linked to a program. The static library is stored as a special archive file with '.. The standard system library can be fo

1. Use the System. Activator class System. activator provides two static methods: createinstance () and createinstancefrom (). If the Assembly containing the class is not found in Appdomain, call createinstance () and createinstancefrom () this will cause the assembly to be loaded. Using System; Using System. Reflection; Namespace ConsoleApplication5 { ClassProgram { Staticvoid Main (String [] args) { Assemblyassembly = Assembly. Load ("Foo. dll "); Typetype = assembly. GetType ("NMFoo.

lines://Initializecomponent ();} [Webmethod] Public Double Calc ( Double R) {Return2*R*Math. Pi;} } It is now running on http: // localhost: 2603/calccircleservice/service. asmx. Go back and modify the above program: XML version = "1.0" encoding = "UTF-8" ?> MX: Application Xmlns: MX = "Http://www.adobe.com/2006/mxml" Layout = "Absolute" > MX: WebService ID = "Calcservice" WSDL = "Http: /localh