four function calculator online

Python Tkinter implements the simple calculator function, pythontkinter In my spare time, I wrote a simple calculator using tkinter to implement simple addition, subtraction, multiplication, division operations. I used two buttons and entrycontrols. below is the code, but I simply used the partial function partial, bec

The Shell implements a simple calculator function with the following script:[[email protected] scripts]# Cat Jisuan.sh#!/bin/bashprint_usage () {printf $ "usage:$0 NUM1 {+|-|*|/} num2\n" Exit 1} #判断传入的参数是不是3个if [$#-ne 3] then print_usagefifirstnum=$1secondnum=$3op=$2# to determine the incoming parameters to see if it is reasonable if [-n "' Echo $firstnum |s Ed ' s/[0-9]//g ' "];then print_usagefiif [" $op

Exit" y/y ") if choice = =" Q "or choice =" Q ": Print ("Thank you for your use") Break ORigin = input ("Enter number >>>>>") if check (origin): New_origin = Format (origin) while re . Search ("\ (", New_origin): #匹配如果有括号, execute the following code New_new_origin = Re.search ("\ ([^ ()]+\)", New_origin). Group () #匹配出最里面的括号里 The expression # Print (New_new_origin) s = Numl_mod (new_new_origin) # print (s) S1 = Poor_ Add (s) s2 = s1[1:-1] New_origin = New_origin.replace (New_new_origin, S2, 1)

#!/usr/bin/env python#-*-coding:utf-8-*-__author__="Loki"#Usage:make a Diy Calculator#Example:#' 1-2 * ((60-30 + ( -40/5) * (9-2*5/3+7/3*99/4*2998+10*568/14))-( -4*3)/(16-3*2)) 'ImportRere_rule='\([^()]+\)'defarithmetical (temp): Result=eval (temp)returnresultdefMain (arithmetic): Step=0 while1: Step+ = 1result=Re.search (Re_rule, arithmetic)ifResult#if exist ' () 'Temp_ =result.group () calc_res=Str (arithmetical (TEMP_)) arithmetic= Re.sub (Re_rule,

This article mainly teaches you how to simply implement the JS calculator function, implement decimal point verification, duplicate calculation, and a large number of operations that better suit the user experience, which has a certain reference value, if you are interested, you can refer to the calculator function: 1.

Python-Regular Expressions implement the calculator function and python-Regular Expressions Requirements: The user enters an operation expression and the terminal displays the calculation result. Code: 1 #! /Usr/bin/env/python3 2 #-*-coding: UTF-8-*-3 4 "the user inputs the computation expression, show the calculation result "5 6 _ author _ = 'jack' 7 8 import re 9 10 bracket = re. compile (R' \ ([^ ()] + \

The calculator features:1. Checksum: decimal points, repeated computations, and a large number of operations that are more in line with the user experience.2. Ability to input from keyboard. Effect Chart: HTML code: CSS code: @CHARSET "UTF-8"; . button {width:73px; height:50px; margin-bottom:5px; border:1px solid #ddd; border-radius:1px; Font-weight:bold; Color: #1e395b; Background:aqua; font-size:

Final Countdownlatch CDL = new Countdownlatch (1); New Thread (New Runnable () { @Override public void Run () { try { thread.sleep (); Cdl.countdown (); } catch (Exception e) { e.printstacktrace ();}}} ). Start (); Cdl.await (ten, timeunit.seconds);Ideas:Countdownlatch blocks the thread through the await method, the countdown method countdownlatch the value minus 1 pe

This article mainly introduced PHP implementation of the simple arithmetic calculator function, combined with an example of PHP based on the implementation of the stack of expression arithmetic function, the need for friends can refer to, hope to help everyone. The structure of the stack can be used here, because the PHP array "natural" has the characteristics o

class operation{public int Numberone {get; set;}public int Numbertwo {get; set;}Construction method does not return a value, not even voidPublic operation (int n1, int n2){This. Numberone = N1;This. Numbertwo = n2;}Record the calculation type of the subclass +-*/Public abstract string Type {get;}Get resultspublic abstract int GetResult ();}}Using System;Using System.Collections.Generic;Using System.Linq;Using System.Text;Using Prooperation;Namespace Prosub{public class Sub:operation{Public Sub

I. Using Msscriptcontrol to execute JavaScript code in C # JavaScript There is an eval method used by people who know his convenience and strength.In C #, we can also execute a piece of JavaScript code through a COM component.The following code shows how to execute a mathematical expression with the Msscriptcontrol component:Msscriptcontrol.scriptcontrolclass sc = new Msscriptcontrol.scriptcontrolclass (); SC. Language = "JavaScript"; object obj = sc. Eval ("500-(110-100)/2*6"); Console.WriteLin

); } Private voidBtnliu_click (Objectsender, EventArgs e) {Jiashuzi (Btnliu). Text); } Private voidBtnqi_click (Objectsender, EventArgs e) {Jiashuzi (Btnqi). Text); } Private voidBtnba_click (Objectsender, EventArgs e) {Jiashuzi (BTNBA). Text); } Private voidBtnjiu_click (Objectsender, EventArgs e) {Jiashuzi (Btnjiu). Text); } #endregion Private voidBtnclear_click (Objectsender, EventArgs e) {Txtshuru. Text="0"; } Priva

Python Regular Expressions implement the calculator function, python Regular Expressions Requirements: The user enters an operation expression and the terminal displays the calculation result. Code: #! /Usr/bin/env/python3 #-*-coding: UTF-8-*-"the user inputs the computation expression, show the calculation result "" _ author _ = 'jack' import rebracket = re. compile (R' \ ([^ ()] + \) ') # Find the inmost

Nonsense not much to say, directly on the code, the basic implementation of subtraction functions:#!/bin/bash#authorbyalsww#date:2016.02.03#mail:[email protected]#blog:alsww.blog.51cto.comprint_info () {printf " Please enter the number: \ n "}print_err_num () {printf" Please enter the correct number!\n "}print_err_fuhao () { printf "Please enter the correct operation symbol (+-*/): \ n"}while:d Oread -p "Please enter the first digit:" num1echo $num 1|grep-q ' ^[-]\? [0-9]\+$ ' break| | print_err

forIinchLi:ifi = ='+': I=0 Nums= Nums +float (i)returnStr (nums)defSimple (x):#handle without parentheses. returnJia_jian (Cheng_chu (x))defJisuan (x):#Handle the parentheses while '(' inchX:reg= Re.compile (r'\([^\(\)]+\)') Ma=Re.search (Reg, X). Group () result= Simple (ma[1:-1]) x= X.replace (MA, result, 1) returnSimple (x)' 1-2.99 * ((60.2-30 + ( -40/5) * (9-2*5/3 + 7/3*99/4*2998 +10.5 * 568/14))-( -4*3)/(16-3*2) ) '. Replace (' ")print(' your results:') , Jisuan (ss))print('eval

The example of this article introduces JavaScript to implement a simple calculator function of the detailed code, share for everyone to reference, the specific content as follows Effect Chart: Implementation code: Hopefully this article will help you learn about JavaScript programming.

Calculator Description: Mainly for the style and some simple text operation, the calculation used is JS built-in eval () function, just need to pass the text box string as a parameter to get results, can be simple operation, very powerful.

This article describes how to implement the simple calculator function based on javascript. For more information, see the examples in this article, the content is as follows: : Implementation code: 《script》 function calc(event){ // test //window.alert(event.value); var val = new String(event.value); // clear space

C # Calculation Expression (similar to the calculator function ), 1. Using MSScriptControl to execute JavaScript code in C #. Anyone who has used an eval method in javascript knows its convenience and strength.In C #, we can also use the Com component to execute javascript code.The following code demonstrates how to use the MSScriptControl component to execute a mathematical expression: MSScriptControl.Scri

(AddButton); Pack (); } Private classInsertactionImplementsActionListener { Public voidactionperformed (ActionEvent e) {String input=E.getactioncommand (); String text=Display.gettext (); if(start) {Display.settext (""); Start=false; } if(Text.startswith (".") {Display.settext ("0" + display.gettext () +input); } Else if(Text.startswith (" -0.") | | Text.startswith ("0.")) {Display.settext (Display.gettext () )+input); } Else if(Text.startswith ("-0")) {Display.settext ("-" +input)