WIP: Command line calculator. Type math expression and press enter to calculate the result. Public member functions add, subtract, multiply, divide, square, and sqrt perform all the calculations. Known bugs. Many functions are similar to the shading HLSL language. Having an Operation array does not help us calculate 1 + 2 * 3 and get 7 instead of 9. Code Quality 28. There was a problem preparing your codespace, please try again. The command line is a quick, powerful, text-based interface developers use to more effectively and efficiently communicate with computers to accomplish a wider set of tasks. It is used to print a line of text in standard output. 2. read The command read in Linux is used to read the input from the keyboard. Build Tools 111. The "=" assignment operator has the highest priority among them. 3. Not efficient! You signed in with another tab or window. If nothing happens, download Xcode and try again. Operators + Addition-Subtraction . That property can be used cleverly to create/update multiple variable in a cascading way: That is possible because, having the same priority, the operators = are evaluated left to right. A C++ program that implements an interpreter for arithmetic calculations and simple memory management - GitHub - bcburin/command-line-calculator: A C++ program that implements an interpreter for ar. All gists Back to GitHub Sign in Sign up Sign in Sign up {{ message }} Instantly share code, notes, and snippets. This calculator accepts input like "1 + 2 * 3 + -(4 - 5)", crunches the numbers according to the standard order of operations, and prints out 8. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. A simple command-line calculator made in Rust. You cannot define methods inside your main method, so this is most likely one of your first programs in Java. That is because an assignment operation always returns the value that was stored in the variable. The array of all possible expressions is combined into an expression tree (see, Add support for a locale-dependent decimal separator. Nothing wrong with that, but this makes you an example of the target audience for most introductory texts for programming in Java (if you do not have a teacher). in ); int a = sc. Skip to content. This is a command-line calculator, written in C, supporting the standard mathematical operations and a set of functions. Learning & practice tools. ; But there must be a better way! The other assignment operators apply an arithmetic operation to the value stored by the variable and the expression, and then store the result in the variable. This is also virtual so it can be overridden for the extra functions in the scientific calc. On the Windows taskbar, select the search icon and type cmd. calc echo "7+8" | calc This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Some of the member functions of Calculator are virtual and are overridden in the Scientific class. Applying the order of operations occurs during the second step. Command-line requests. A tag already exists with the provided branch name. For Linux users: Built-in Linux Terminal. Using the g++ compiler in Git Bash, it can be done with the command: Afterwars, execute the resulting .exe file. A simple command-line calculator. There are suggested programming exercises at the bottom of this page, in case you are interested in adding new features to the calculator. We've changed each line's command from pick to the command we're interested in. Em-AK commented on Mar 17, 2020 edited This simplifies the main code as the statement calcPtr->welcome() will automatically call the right welcome function, detailing out the proper options for the current mode. Wei-Lun Chao <bluebat@member.fsf.org> 29 Mar. You can launch GitHub Desktop from the command line. echo is one of the mostly used command. Learn more. > expr \( 9 - 3 The method of authenticating is determined based on whether you choose an HTTPS or SSH remote URL when you clone the repository. nextInt (); int b = sc. Learn about technical concepts. Prompt user for the desired operation (polymorphically determine the message based on the current mode; show more options while in scientific mode), Get additional data from the user (if doing addition, get 2 numbers). Early evaluation Specifically, Calculator has 2 protected data members, result and mem. For example, "45 + -3" yields these Glyph values: At this point we know very little about what the user input means. flyingsl0ths / arith Public. Are you sure you want to create this branch? A tag already exists with the provided branch name. Navigate into the local Git repository that has the merge conflict. Clean with make clean. They can be created with the assignment operator =. But I didn't let that stop me from solving a very interesting problem! Get help with using AutoHotkey and its commands and hotkeys. You can also change to your repository path . Since this operation requires your input, Git opens your text . $ git status > # On branch branch-b > # You have unmerged paths. Expressions are strings containing numbers (or varibles) and the above operations. Example Usage cos (pi/2) 0xFF ^ 0b10 2**8-1 log (2) factorial (42) Installation pip install cli-calc pypi cli-calc. 1 branch 0 tags. The code in operationizer.swift creates operations from tokens. This is designed for use in situations such as shell scripting, where only the raw, unprocessed value is desired. This is the base class for the calculator program. For example: # create a file with 100 random numbers, 1 per line $ jot -r 100 > /tmp/random # the max, min, mean of that random data $ calc.py max /tmp/random 100.0 For example: +, add, addition, sum all trigger the addition operation. They are both doubles, and they are initialized to 0 in the constructor. For Windows users, I included my Code::Blocks project file, Calculator.cbp.Open this with the Code::Blocks IDE.. Salem. That can be worked around with the use of parentheses. You can use addition (+), subtraction (-), multiplication (*), division (/), parentheses, exponents (^), and so forth. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. It has two modes, regular and scientific, that a user can switch between. Starting the calculator and entering get mode reveals that it defaults to radians. This article describes the data transformations involved with calculating an answer, but it doesn't show how they work. Learn more. Raw calculator.ts This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. Find the file you downloaded and delete it. Computation begins with the tokenization of the input string, maintaining original infix order. The switch to scientific mode will be made by pointing this Calculator class pointer at a derived Scientific class object. When naming variables, there are some rules that must be followed: The interpreter signals with >> the place for user input. Otherwise, it will create a new directory in the current working directory. This means that any type of element can be stored on the stack at the same time as any element of any other type - including custom types - as long as an element's type is known when it is popped off the stack. When you see UnicodeScalar in this program, just think of it as a character in a string. First, we need to create a new project. print "2) Subtract" print "3) Divide" print "4) Multiply" print "5) Squared" print "6) Square Root" print print "0) Exit" The user input is a string which may or may not contain valid arithmetic expressions. When the evalStackPush() function sees an operator, rather than pushing it, pops its operands, runs the computation, and pushes the result. For Windows users, I included my Code::Blocks project file, Calculator.cbp. The world doesn't need another way to crunch numbers on their Macs. GitHub Instantly share code, notes, and snippets. Collaboration 30. Does not use eval(). Cl Calc: Online Command-Line Calculator ? main.cpp. For example, "10 * (5 - 1) + 2.0" is represented by these Token values: Having tokens brings us much closer to being able to create an expression tree and calculate the answer, but we're not quite there yet. This data representation categorizes a token into only two possible values: .binaryOperator or .operand. Since Swift strings are Unicode-compliant each character technically might consist of multiple scalars, but for the set of supported symbols in this program we don't need to worry about that. Here are some examples of valid expressions: Obs: whitespace between the operators, numbers and variables is ignored. However, = returns a number, not a variable, as required by += on its left had side. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Note: The digit case has an associated UnicodeScalar value. Commands can be entered in standard infix syntax, with parentheses denoting nonstandard order of operations. Analysis of each user input character occurs in input-parser.swift. They can also be updated with the use of = or other assignment operators, such as +=, *=, etc. NitishDiwakar / calculator.cpp Created 6 years ago Star 1 Fork 0 Code Revisions 1 Stars 1 Embed Download ZIP A command line calculator in C++ Raw calculator.cpp # include<iostream> # include<cmath> using namespace std; int main () { Calculating each operation in the correct order can occur after transforming operations into an expression. The author is not to be held responsible for problems caused by or related to incorrect values produced by the program. $ echo [-neE] [arg .] jimmy087 / Calculator.java Created May 4, 2013 Code Revisions A program for command line calculator. Created Aug 12, 2014. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Powerful yet easy command line calculator. UI/UX. This is a simple tax calculator app that communicates with an existing API endpoint in order to calculate the total income tax for an input salary and tax year. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Configuration In order to run it from anywhere: Add a symbolic link in ~/bin cd ~ /bin ln -s ~ /path/to/your/install/cli_calc/warpper.sh calc Then use it anywhere. For one, the command line is the only place you can run all Git commands most of the GUIs implement only a partial subset of Git functionality for simplicity. Note that the calculator respects all expected conventions such as order of operations. . Just got done commiting and pushing to github. To use it, simply compile the .cpp files in the src directory. mem is used by the user to store a number in memory and access it later for further computation. println ( a + b ); break; case 2: With collaboration layers like the GitHub flow, a community of 15 million developers . It calls the Calculator constructor to initialize result and mem. The calculator helpfully answers: 2 You can perform other commands here. You know, like you were taught in elementary and middle school. Open your Console/Terminal/Powershell/Command Prompt. Contribute to fhbilgen/CommandLineCalculator development by creating an account on GitHub. Git skips the first rebase command, pick 1fc6c95, since it doesn't need to do anything. Open your Console/Terminal/Powershell/Command Prompt, Run "cargo install command_line_calculator --force", Run "cargo uninstall command_line_calculator", Go to https://github.com/SmushyRepo/command_line_calculator/releases/. A token array is a flat list while an expression tree is a highly nested binary tree. A tag already exists with the provided branch name. type "command_line_calculator" to run it. Creating a simple solution for this problem was a fun, tricky challenge. result stores the result of the last computation. A simple command-line calculator made in Rust. After the successful installation of GIT, there is a need to configure git using the following commands: Open terminal: git --version To check version of git To set your username git config --global user.name "FIRST_NAME LAST_NAME" To set your email If we would like to multiply numbers we have to be careful. At the highest level, this program turns a string into either a number or an error message. Go to file. This ambiguity can be reduced, thanks to the metadata provided by Glyph, to create more meaningful tokens. For example, if you want to calculate sin(pi/2):. There are some examples of correct usage below: Trying to use a varible before it was created, either as an operand for an arithmetic operation or with the use of an assignment operator other than =, will inevitably result in an error: Notice that each assignment operation is itself an expression, as can be seen by the results shown below them. That property can be quite advantageous when creating varables: The variable _ is always available (does not have to be created) and stores the value of the last expression: The program can be exited at any time with the exit() command: This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. PHP. For Windows users: Built-in command line. Cheatsheets. As this class contains virtual functions, a virtual destructor will be included. nextInt (); switch ( operator) { case 1: System. All assignment operators are listed below in order of increasing priority: Obs: all assignment operators have lower priority than the arithmetic operators. If nothing happens, download GitHub Desktop and try again. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. In Git Bash: The supported arithmetic binary operations are listed below in order of increasing priority: Assignment operators always operate on a variable (left) and an expression (right). A Token is a symbol created from one or more Glyph values. When asked, use the "default starter app . 4. bc Command 364e88e 1 hour ago. Command Line Interface . MIT/Apache. The result of a previous calculation is always stored and can be accessed using the keyword. GitHub hosts Git repositories and provides developers with tools to ship better code through command line features, issues (threaded discussions), pull requests, code review, or the use of a collection of free and for-purchase apps in the GitHub Marketplace. A properly constructed expression tree can be recursively evaluated to calculate the correct answer. It has data members and member functions that will display messages to the screen, prompt for user input, and perform calculations. parseOperation() takes in the user input string and calls the appropriate member function. Due to the nature of the shunting-yard algorithm, as soon as an operator is pushed, it can be evaluated. If it encounters an unrecognized symbol, an error is returned. Since other assignment operators have less priority, the must come before in that cascade. Options are as follows: Build with make. It has two modes, regular and scientific, that a user can switch between. python3 ./calculate.py. And there is To investigate tokenization of an input string, mathematical expressions in infix and postfix notation, and an untyped stack data structure. There are multiple data transformations involved, each of which analyzes incoming data and emits different data morphed one step closer to the final result. Enjoy https://github.com/ijoshsmith/command-line-calculator Share this: Twitter Facebook Reddit Loading. Sure, macOS comes with the built-in Calculator app and bc bash program. If a file path is given, the new directory will be placed at the end. kalk just launched and is available as a preview, try it out! Command Line Interface . A tag already exists with the provided branch name. Compiles and runs . You know, like you were taught in elementary and middle school. GitHub: https://github.com/SmushyRepo/command_line_calculator/, Cargo: https://crates.io/crates/command_line_calculator/. Settings It uses CharacterSet from the Foundation framework to categorize a character. Run with ./calc. An Expression is the highest abstraction level in the calculator's data transformation pipeline. Advertising . Star 0 Fork 0; Star A command to calculate lines of code in all tracked files in a Git repo Raw Count lines in Git repo // Reference: http://stackoverflow.com/questions/4822471/count-number-of-lines-in-a-git-repository $ git ls-files | xargs wc -l Load earlier comments. 2014 A Command-line Calculator in A Command-line Calculator in pure BASH pure BASH Hong Kong Open Source Conference Not efficient! Learn more. Are you sure you want to create this branch? Calculator What. Work fast with our official CLI. You signed in with another tab or window. Open this with the Code::Blocks IDE. parseInput() looks for those strings and gets the values from memory to be used in any calculations. #include <iostream> #include <stdlib.h> #include <sstream> #include "display.h" #include "value.h" /* Checklist: Display (done) 0-9, +, -, /, X, =, ., ON, OFF, C (done) C button always resets display to 0 (done) Calculator initially off (done) When off, calculator has nothing on display (done) When turned on, calculator shows 0 (done . dfenjves / gist:1f2712b64d0cf82fe4a5. Recursing the nodes bottom-up and left-to-right ensures the expressions are evaluated according to the order of operations, as seen in calculator.swift. *; public class Calculator { public static void main ( String args []) { Scanner sc = new Scanner ( System. Implement Command-Line-Calculator with how-to, Q&A, fixes, code snippets. The shell command mkdir is used to make a new directory in the filesystem according to its argument.
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