The calculator code in this article is very simple and you can easily apply the Web effects to your project.
Html
First we put an input box and multiple calculator buttons on the Web page.
Js
Follow the action type:
function operator (type) {switch (type) {case "clear": Input.value = "0";
_string.length = 0;
/*document.getelementbyid ("CCC"). innerhtml= "";
for
Today to share a calculator program written in pure JavaScript code, many industries can use this program, such as the decoration budget, loan rates and so on.
First look at the effect after the completion:
Method One:
Write the code as follows:
code two:
method Three:
Above in three ways to achieve the pure JavaScript code implementation calculator function, I h
C # Implementing a calendar-style drop-down calculatorOriginal address: http://developer.51cto.com/art/201508/487486.htmIf we are working on a project similar to the Inventory Control and billing system, some parts may have to calculate the values manually. Therefore, the user will have to use the calculator to get the results, fill in the input fields, or open a separate calculator window on the work windo
1. Quick calculator Mode
In emacs23, you can use the M-x quick-Calc command or the shortcut key C-x * Q to start the quick calculator mode. This is a very small tool. After it is started, it will prompt the input mathematical formula in minibuffer, and press enter to display the result. This mode can be easily used for some basic mathematical operations, which is more convenient and quicker than using the b
In this mini-program development tutorial, we will introduce how to use the mini-program development calculator function. This article is divided into two parts: the main part of the applet and the business page of the calculator. in this mini-program development tutorial, we will introduce how to use the mini-program development calculator function.
This articl
I. Preface
The computer (calc.exe) Program has existed for a long time in windows and is also a very common software. But in general, it displays Arabic numbers, and there is no switching between character display. This time I will discuss in two articles how to make the calculator program display Chinese characters and numbers. This article discusses the basic principles of modification, and the next article discusses how to implement programming.
1. Basic operation
Basic operation and Calculator, support keyboard operation, mouse over the button hover, in addition to the number key will pop-up prompts, prompt behind the parentheses is keyboard operation shortcut keys.
2. Hover, streamline and minimize
The calculator supports automatic hover of the screen edge. When you drag the calculator to the edge o
This project course uses the Java language to complete a simple calculator. You will use the Java Swing graphics components and so on.
first, the experiment introduction
The experiment produced a simple arithmetic calculator that will be developed using Java swing. 1.1 Knowledge points Java Swing Interface Programming Calculator Logic Operation Realization 1.2
calculation of the symbolExp_sum = ADD_SUB (exp)#Call Add_sub to calculate addition and subtraction returnExp_sum#float #返回计算结果defMain (exp): Exp= Exp.replace (' ',"')#Delete spaces in a string whileTrue:ret= Re.search ('\([^()]+\)', exp)#Match parentheses ifRet:#if it matches.Inner_bracket = Ret.group ()#use Group () to extract the bracketed content that matches tores = str (cal (Inner_bracket))#call Cal () to calculate the contents of parentheses and convert the returned result
(i)elifFIND_[INDEX-1] = ="-": #If two negative numbers are subtracted, they are added or subtracted ifTag = =True:res+=float (i)Else: Res-=float (i)Else: #case where I is empty when processing without parentheses ifI! ="": Res=float (i)returnResif __name__=='__main__': whileTrue:calc_input= Input ("Please enter a calculation formula \ n default to:%s:"%a). Strip ()Try: ifLen (calc_input) = =0:calc_input=a calc_input= R'%s'%calc_input#do special treatment t
@__create_say_zsq ()def __init__ (Self,num):Self.__result = num@__check_num_zsq@__create_say_zsq ("plus")def Jia (self,n):Self.__result + = nreturn self@__check_num_zsq@__create_say_zsq ("Minus")Def Jian (self,n):Self.__result-= nreturn self@__check_num_zsq@__create_say_zsq ("multiply")def Chen (self,n):Self.__result *= Nreturn selfDef show (self):Self.__say ("The result of the calculation is:%d"%self.__result)Print ("The result of the calculation is:%d"%self.__result)return selfdef clear (self)
The code is as follows:Import Java.awt.*;import javax.swing.*;p ublic class Gridframe extends JFrame {//define string array, assign a value to the display text of the button string str[] = {"MC", "MR", "MS", "m+", "←", "C", "%", "π", "7", "8", "9", "/", "4", "5", "6", "*", "1", "2", "3", "-", "0", ".", "=", "+"};p UBL IC Gridframe () {//define panel and set to Grid layout, 4 rows 4 columns, component horizontal, vertical spacing is 7JPanel pan = new JPanel ();p an.setlayout (New GridLayout (6, 4
I used to look at PHP when I wanted to do this, but there has been no time, this time finally took a sneak into the code more than the amount of project.First of all, the document structure, all in one folder is good, my example is the following.Start by entering the index.php file.Doing a couple of things.1. The number of passes that can be obtained by $get_[the "action" method and the $_request ["action"] method is rect, triangle or circle.2. The two classes of form.class.php and result.class.
This is my copy of a calculator, feel the process is relatively simple, so share.
1. Create a new file, find a material to put in a grain of wood
2. New layer, fill a black radial gradient
3. Draw a rectangle with rounded corners. The final painting here has a shape filler tool to draw, the right amount of graphics size adjustment is not easy to distort, but also suitable for
Various sizes. Easy to modify. Fill style specific
(atom_exp,res)Else: returnExpdefadd_sub (exp): RET= Re.findall ("[+-]?\d+ (?: \. \d+)?", exp)#Take out the numbers and symbols in front of the numbers FindAll returns a list to find all itemsExp_sum =0 forIinchRet:exp_sum= Exp_sum + float (i)#The string is taken out. returnExp_sumdefCAL (exp): Exp=MUL_DIV (exp) Exp=Format (exp) exp_sum=add_sub (exp)returnExp_sumdefMain (exp): Exp= Exp.replace (" ","") whileTrue:ret= Re.search ("\([^()]+\)", exp)ifRet:inner_bracket=Ret.group ()
This JSP page is designed to implement the ability to submit and receive data on the same page .There are a lot of shortcomings in this small program, I hope you will criticize.The implementation results are as follows:How to implement a simple calculator with JSP (c)
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