How To Implement a Scientific Calculator in C++Table of Contents Abstract Introduction. Mathematical problems coding Inputs wide possibilities The input formulas should match standard rules of math. Length of input formula Implementation overview Data class My. Checker class My. Amazon.com : HP 32Sii Scientific Calculator : Electronics. Amazon Try Prime Electronics Go. Sign in Your Account Sign in Your. It's easy to program, and its RPN continues to be one of my favorite features. Javascript calculator with calculation history, math functions, hexadecimal, octal, and scientific notation. This program is distributed in the hope that it will be useful. Ever wish that you could have a program on your calculator to do long drawn out formulas for you? With this tutorial you will be able to program formulas into your. How to Create Programs on a Graphing Calculator. Fixer class Calculator class User guide Appendix Linked lists Conclusion 1. Abstract Have you ever tried to put the upper formula in one of your programs, but you found it hard to be calculated? Have you ever stopped writing one of your programs because you need to use complex formulas and there isn't a way to calculate them in your programming language? Have you gone to use programming languages such as FORTAN or MATLAB, because you need to use some of their mathematical power, although at the same time if you have this power in your main language you may produce a better program? If you are one of those, then this article may be good for you as it gives you two solutions to your problem; one is how to write mathematics programs, and the other is a header file in C++ that you can use to calculate formulas like that in Fig. C++ programs. Introduction Mathematical programming, together with subordinate programming languages, is the backbone of any programming language and one of the most important reasons to use computers. That is because nearly all sciences in the world is dependent on mathematics. Then, the need to easier methods to do mathematics continues to be one of the most required things nowadays and will still be obtainable until the end of the world. So, from this point, we are working to implement a scientific calculator written by me, and shall be written by you in the next days, unless you don't want to do so. In C++, there are some libraries that function on mathematics such as math. Mathematical Problems coding While writing mathematics programs, you will experience some problems which all programmers have experienced before. I put these problems in your hand in order to pay attention. How To Implement a Scientific Calculator in C++. Calculator class; User guide. This article is to give you the lines on how to program a scientific calculators. Java Scientific Calculator was originally designed as part of a web application to show how you can use a calculator to calculate confidence intervals. If there is no installer program for your platform. Fully functional free online scientific calculator with double digit precision. Also find hundreds of other free online calculators. Scientific Fraction Percentage Time Triangle Volume Number Sequence More Math Calculators. You may not look at this as a problem as the word means, but I write the problem that has caused me some difficulty during coding. Inputs Wide Possibilities The first problem which you may experience is the inputs wide possibilities. You don't know what the user will give you as input, so you should first determine what kind of math your program will deal with, and make sure that your user won't enter anything outside it especially if you receive the inputs as a string or a stream, or you receive it by a console interface. So to handle this problem, you should first check the inputs and then do your operations progressively on the input, for example. Length of Input Formula. The third problem you may have is the input length, since the user may enter short or long formulas. In this case, you have two solutions: the first is using a long array which can read any length of input formula, but it's a bad solution in my opinion because it will waste memory if the user enters a small formula. The best solution in my opinion is using counters which depend on linked lists (see the appendix) as it allocates memory as you need only, and so you won't allocate memory more than your requirement. In this case, I use vectors. Overview of the Implementation. Data Class. Data class is the container class of my implementation. In this class, I put the main libraries which I need in the program and the public method which I will use as assistant functions as: double char. Vtod (vector< char> ch) function converts a double number form the input formula to a double number. Num (vector< char> & form, int & orderm, int & digit); read a number form the input formula. Digits(long num); count the digits of a long number. Vchar (double num); convert double numbers to a vector of characters. My. Checker Class. My. Checker class is a class which is used for checking the input formula and the agreement of it to my program mathematical cover as if the user enters a wrong formula; this class should alert him about that, wrong entry as such as: x**x ,si(4. About functions. inline bool is. Op(char & ch); is used for checking for normal operators +, - , *, /. Var(vector< char> vars,char & ch); is used for checking for variables. My. Fixer Class My. Fixerclass is the class which its minor is to edit formulas in order to make formula adaptable to my program and the next class calculator, for example: if the input is xx put * between them and the result become x*x; this function has only two functions; one of them is invoking the other: void fix(vector< char> & ch); This function is invoked by other son classes and receives the formula and sends it to the other function. Calculator Class. Calculatorclass is the backbone of this program, this class's functions are the functions which give the calculation of a formula; with discovering its functions: first. Rank, second. Rank and third. Rank are functions which divide formula to three phases: The first related to power and trigonometric functions, the second is for * and / operations and the third is for + and - operations, with putting on consider the function get. Borderis using for determining the brackets which calculation is done within and then delete it. This class has 6 overloading of the function calcfor working with the three cases which take characters vector, arrays and strings; the functions . User Guide Now we have the part of how to use these classes: First, you need to include these classes in your program. Make including in your cpp file for calculator. Make an object from calculator class. Use one of the six overloading calc functions. For example, if you want to get a function from the user with one variable, then get the variable's value and print the result, the code will be as follows: #include. Linked List In computer science, a linked list. Under the simplest form, each node is composed of a datum and a reference (in other words, a link) to the next node in the sequence; more complex variants add additional links. This structure allows for efficient insertion or removal of elements from any position in the sequence. Conclusion This article is to give you the lines on how to program a scientific calculators, but there isn't everything. This field is so wide and there is a lot of research on it, but I wish this article will help you to start. Reference http: //en.
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