calculator

I've written a few methods for a calculator. One, which evaluates an entered Postfix expression and another, which transfers an entered infix expression into a postfix expression. Both these methods allow multi digit integers aswell as floats for the number input types. Now for my question: I want to include the negative input in both these methods e.g. Infix: "3 * (-1)". However I'm kinda lacking an idea on how to implement this problem. Maybe someone can give me ideas or code examples. I'm including both methods below. A few simple methods are used in them which aren't shown here, but most

I'm currently working on a Calculator app and I want output to be in both a simplified expression and decimal answer form. An example would be sqrt 2 * sqrt 3 = sqrt 6 which can also be outputted as 2.44948... What is the best approach to this and is there any well-established algorithms to do this? Yes. What you likely want is a computer algebra system , which understands formulas as artifacts to be manipulated by explicit mathematics rules. Mathematica and Macsyma are applications which do this. However, these are quite sophisticated systems and it is not easy to see how they "work". What

Closed . This question needs details or clarity . It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post . Closed 3 years ago . I'm trying to learn how to calculate the logarithm base 10 of any numbers that I enter via scanf to my code. I figure that I could calculate the ln(a) a being the number input. I have a working code that calculates this; however now i just want to divide any numbers that my ln(a) code outputs by the defined LN10. This is because the natural log of a number divided by the natural log of 10 will

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center . Closed 6 years ago . I am building a simple GUI Java calculator. I have an issue finding a package or figuring out a method to do the actual calculation. So far I've figured that when I do a math operation, the number in the text box gets saved in a temporary location. Then

I've just learned java but from my old experience coming from C++ i tought that i can write a commandline calculator wich supports all 4 basic operators with just one line. But i am having a bit of problem. This is my code: import java.util.Scanner; public class omg { public static void main(String args[]) { int fnum,snum,anum = 0; String strtype; //The original calculation as string char[] testchar; //Calculation as chararray char currentchar; //current char in the char array for the loop int machinecode = 0; //Operator converted to integer manually String tempnumstr; //first and second