Calculator

A simple command line calculator written in Go

Build instructions

Follow the instructions and copy the commands below to build the app

1. Clone this repo

git clone https://github.com/ayushknath/calc-go.git

2. Move to the src directory and build the app

cd ./calc-go/src
go build -o ../build/calc

3. The executable is under the build directory

cd ../build
./calc add 2 3

Features

The app has two modes

1. Normal mode: Here you can perform simple calculations by specifying the operation and the arguments (numbers) to operate upon
2. Interactive mode: Spins up a REPL where you can write "not-so-complex" expressions and get their result

Normal mode

Simple calculations can be done with built-in commands, each of which accept two arguments like:

1. ./calc add 2 3 for addition
2. ./calc sub 2 3 for subtraction
3. ./calc mul 2 3 for multiplication
4. ./calc div 2 3 for division
5. ./calc exp 2 3 for exponentiation

Interactive mode

To enter the REPL, type ./calc -i. To quit the REPL, type quit

$ ./calc -i
Interactive mode

>> 2 + 3 * (8 - 4)
14.00
>> quit
$