calculator

How to make a wacky math calculator? (Preferably in c++ but others are ok too.)

由 一曲冷凌霜 提交于 2019-12-22 10:43:53
问题 I would like to know how to do some lower-level thing in C++ that will allow me to do some "wacky" math operations. Specifically my two questions are: 1) How can I define my own math symbol that the compiler will be able to recognizes in my code . In other words, I'm not looking to parse a string from a user, but rather have the compiler recognize this as a new math operation. ex: 3 {+} 4 will actually do 3 – 4 etc. 2) How can I define a custom number from an ASCII symbol. For example, define

my if statement within my switch statement does not work correct within my calculator. need help fixing the divide by 0 error

由 跟風遠走 提交于 2019-12-20 07:46:29
问题 i created a basic calculator, but with division i coded it, that when i divide by zero it will give the error to the user in the 2nd textbox, but now even if i divide by 3 or any other number that is not 0, the error keeps appearing in my second textbox. namespace calc { /// <summary> /// An empty page that can be used on its own or navigated to within a Frame. /// </summary> public sealed partial class MainPage : Page { Double num01 = 0; int Operation = 0; public MainPage() { this

Custom math functions vs. supplied Math functions?

由 和自甴很熟 提交于 2019-12-20 05:56:17
问题 I am basically making a Java program that will have to run a lot of calculations pretty quickly(each frame, aiming for at least 30 f/s). These will mostly be trigonometric and power functions. The question I'm asking is: Which is faster: using the already-supplied-by-Java Math functions? Or writing my own functions to run? 回答1: The built-in Math functions will be extremely difficult to beat, given that most of them have special JVM magic that makes them use hardware intrinsics. You could

Javascript calculator result flashes

由 旧城冷巷雨未停 提交于 2019-12-20 05:36:09
问题 My Code: "edited, added "var" in front of all variable, thanks. I tried removing the <form> but it wouldn't function when I did. <head> <title>Calculator</title> <script language="javascript"> function calculate() { var v=parseInt(document.forms[0].txt1st.value); var w=parseInt(document.forms[0].txt2nd.value); var x=parseInt(document.forms[0].txt3rd.value); var y=703; var z = (v/w/x*y).toFixed(3); document.getElementById("display").innerHTML=z; } </script> </head> <body> <form name="cal"

Opening a Calculator in Android

由 纵然是瞬间 提交于 2019-12-20 04:23:41
问题 I'm looking to open a calculator from within my Activity. Here's my code right now and it works: Intent i = new Intent(); i.setClassName("com.android.calculator2", "com.android.calculator2.Calculator"); I would like to make this an implicit call because I don't know what calculator the use would like to use and I would like to leave the option open to receive a value from the calculator, which the android one apparently doesn't do. I haven't been able to find a good example of how to

Android Calculator - Editview cannot input decimal places

由 独自空忆成欢 提交于 2019-12-20 04:16:18
问题 I am new to Android code development...I am developing a Android calculator apps and does not understand why the two EditTexts (first input and second input) cannot accept decimal places but can only input integers...Here attached as follows are the codes: Thanks! =============Main Activity=============================== package com.trial.jm4_calculator; import android.os.Bundle; import android.app.Activity; import android.view.Menu; import android.view.MenuItem; import android.view.View;

Java calculator not executing if-statement [duplicate]

由 馋奶兔 提交于 2019-12-19 22:04:00
问题 This question already has answers here : Using scanner.nextLine() [duplicate] (5 answers) Scanner issue when using nextLine after nextXXX [duplicate] Closed 5 years ago . I'm relatively new to programming and have recently started learning Java in order to move into Android programming. I thought I would create a very simple calculator to practice, but it seems that my if statement doesn't work. import java.util.Scanner; public class Calculator { public static void main(String[] args) { /

Change Default Buttons in Java to Make Them Look “Better”

由 大憨熊 提交于 2019-12-19 05:45:17
问题 I'm essentially trying to mimic the default windows xp simple calculator. When I change the background colours of the buttons in Java it makes them look very flat and "boring". I want to make the buttons look as close as possible to the buttons in the Windows XP calculator. Here is an image comparing mine to WinXp's: Is there some kind of method I can use to change the style of the buttons much like you can do in Visual Basic to make the buttons almost pop more or look 3D like the Windows Xp

How do I compute an array (or string) of numbers and mathematical operators

由 人走茶凉 提交于 2019-12-19 04:24:09
问题 I am making a calculator and pushing/saving all the numbers and operators clicked to an array and a string. I want to know which approach is the best in this case . Making a string or an array from the input OR a better approach I can't think of. I want to compute the array or string. The string is giving wrong answers and I don't have a clue on how I can compute the array. The demo calculator is below. $(document).ready(function(){ var inputArr = []; var inputStr = ''; $('span').click

Calculating mortgage interest in Python

由 别来无恙 提交于 2019-12-18 13:14:11
问题 I am currently learning python through a video tutorial on youtube, and have come up against a formula I cannot seem to grasp, as nothing looks right to me. The basic concept of the excersise is to make a mortgage calculator that asks the user to input 3 pieces of information, Loan Amount, Interest Rate, and Loan Term (years) then it calculates the monthly payments to the user. here is my code: __author__ = 'Rick' # This program calculates monthly repayments on an interest rate loan/mortgage.
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