penny calculator

public class Counter {/** uses recursive algorithms to calculate the formula in parentheses and then recursively* @param args*/public static void calculator (String str) {System.out.println (str);Load to StringBuffer boost efficiencyStringBuffer cstr= new StringBuffer (str);To group the remaining symbols and numbers in a formula with a regularPattern P=pattern.compile ("\\-?[ 0-9]+ (\\.[ 0-9]+)? | [*/]");if (Cstr.length () ==0) System.out.println ("En

principle:1. Change the expression of the middle order to an expression2. The current character is a number, put that number in the stack3. The current character is an operator, take out two trees from the stack, operate from the operator, and put the results of the operation into the stack4. Repeat until the character is finished. Only one element is left in the stack, that is, the result of the operation PS: I did not deal with it. Only be able to perform operations within 10, assuming there i

1, JSP development mode:1.sun Company introduced JSP Technology, but also recommended two types of Web application development model, one is Jsp+javabean, one is Servlet+jsp+javabeanThe 2.jsp+javabean model is suitable for developing Web applications where business logic is less complex, in which the JavaBean is used to encapsulate business data, and the JSP is responsible for processing user requests and displaying data.The 3.servlet+jsp+javabean (MVC) pattern is suitable for developing complex

Calculator. java: /*** @ Title: Calculator. java * @ Package: com. you. model * @ Description: The value class for encapsulation calculation * @ author: Youhaidong (Youhaidong) * @ date: 10:40:34 * @ version V1.0 */package com. you. model; import java. io. serializable;/*** class Function Description * class modifier modification date * modification Description *Title:

Under Linux, there is a command-line calculator: BC. The program is generally released with the release.The BC Calculator is capable of performing some basic calculations, including +,-,x,\,%.These calculations are not for decimal, and can be binary, octal, hexadecimal, and can be mixed!StartWhen you start, enter the BC command at the terminalExitYou can use Ctrl+d when exiting, or you can enter quit.Precis

principle:1. Change the middle order expression to follow-up expression2. The current character is a number, put that number in the stack3. The current character is the operator, take out two trees from the stack, according to operator operation, put the result of the operation into the stack4. Repeat until the character is finished, and there is only one element left in the stack, that is, the result of the operation PS: I do not handle, can only run 10 of the operation, if necessary can be ext

"Programming Marathon algorithm Directory"" 017-emacs Calculator" "Project download >>>"1 Topic DescriptionEmacs is called God's editor, and it comes with a calculator. Unlike other calculators, it is based on the suffix expression, which is the operator after the operand. For example, "2 3 +" is equivalent to the infix expression of "2 + 3".Ask you to implement a suffix expression for the

Since the computer desktop and mobile desktop can be free to change the theme, then give the calculator to replace the theme is not difficult, as long as the master of Photoshop to draw the Crystal button method, then design a crystal texture and is the crisp orange theme of the skin calculator is so easy! Creates a new file with a pixel size 300*400, a resolution of 100, and a canvas size of 1

-----------------------------------------------------Experimental Report-------------------------------------------------------- First, the purpose of the experimentA, Project description:Improved the Java calculator designed for the previous project and designed a feature-enhanced calculator. From the most basic add, subtract, multiply, divide, to the basic mathematical function processing, and then to the

Let's click "View" on the Windows7 system's calculator interface to see what we find. Click on the scientific type, the appearance of the interface is our students commonly used scientific calculator Continue to point to view, select the programmer, the following image of the interface is the programmer calculator interface, do you feel incredible? This can be

method One: At the beginning of the interface quickly find Enter the Win8.1 Start screen interface and click the down arrow at the bottom to enter more options, as shown in the following image: After that we can quickly find the calculator in more options, click Open, as shown in the following image: 　　Method Two: Use Win8.1 powerful search function to quickly find calculator In Win8.1 any

J2ME Application Example-a simple calculator implementation (with source code) Using the low-level user interface to make a simple calculator based on the Nokia S60 series, we hope to help. This article only contains the program code, if you need picture files and source code please send me an e-mail: cqucyf@263.net The source code is as follows Calcmidlet.java Package My.calc; Import javax.microedition

Hello everyone, today put a day off, bored I simply knocked the source code of the calculator, found that the previous things are almost forgotten, so while still a little memory, first try to knock back the feeling of the previous ....Well, don't say much, first look at the original code:First create a main class:public class test{public static void Main (string[] args) {Calculator calc=new

PHP calculator (Factory mode) php code abstract class Calculator { private $number1; private $number2; public $result;/** * @return the $number2 */public function getNumber2() {return $this->number2;}/** * @param field_type $number2 */public function setNumber2($number2) {$this->number2 = $number2;}/** * @return the $number1 */public function getNumber1() {return $this->number1;

The code is as followsImport Java.awt.*;import java.awt.event.*;import Javax.swing.*;import Java.util.vector;public class Calculator {Strin G str1 = "0"; Operand 1 Initial value must be 0 for program security String str2 = "0"; Operand 2 String signal = "+"; Operator String result = "";//result//status switch int k1 = 1;//switch 1 used to select input direction to be written to str2 or str2 int k2 = 1;//Switch 2 sign key number k2 Gt;1 instructions ar

The definition of PHP stack, the method of inbound and outbound stack, and the complete example of the calculator Based on stack implementation, php Stack This article describes the definition of the PHP stack, the method of the inbound stack and the calculator Based on the stack implementation. We will share this with you for your reference. The details are as follows: Stack is a linear table. It features

Table of Contents1 series Article address 2 a perfect equals method should contain content 3 modify part of the code in the Exchange Rate Converter 1 Series Article address java exchange rate calculator implementation (1) java exchange rate calculator Implementation (2) java exchange rate calculator implementation-Episode 1-regular expression (1) java exchange ra

Run: Actually, python is a very powerful calculator: ^ _ ^, VcD4KPHA + kernel + PC9wPgo8cHJlIGNsYXNzPQ = "brush: java;" >__ author _ = 'job' class ExpStack (): # init method def _ init _ (self ): self. top =-1 self. data = [] # whether Stack is empty def is_empty (self): return-1 = self. top # pop an element from stack def pop (self): if self. is_empty (): print "Stack is Empty... "else: self. data. pop (self. top) self. top-= 1 # push an el

Python PyQt5 implements simple calculator function example, pythonpyqt5 This example describes the simple calculator function implemented by Python PyQt5. We will share this with you for your reference. The details are as follows: The computing functions (self.calculator) Not implemented. If you are interested, you can implement it. [Knowledge point] 1. Add button parts cyclically and set signals/slots for

 Introduction to Android GridLayout, Calculator for exampleAndroid GridLayout Default horizontal layout element from left to right. You can control whether the orientation of the child element layout is horizontal or vertical by setting the property: Android:orientation=.The GridLayout properties Android:layout_row and Android:layout_column set constant values to specify the number of rows that the GridLayout displays.Set the Android:layout_rowspan