This a basic calculator module with cli applications that can preform basic arithmetic.
The calculator adheres to BoDMAS rules. It can only perform Multiplication, Division, Addition and Subtraction.
This project was developed to help practice and expand my skills in the Go language, as well as an opportunity to learn how the GO ecosystem and workflow works.
This is one of the first pieces of Go-lang code I have written outside of basic tutorials and welcome in criticism and feedback. The goal of this project was to practice TDD in GO.
The calculator works by taking in a string sum returning a float with the answer or an error.
A sum can consist of Multiplication, Division, Addition and Subtraction and brackets. like below
"2 + 3 * 4 / 4 - 6"
The calculator can be used as a GO module inside other projects or as compiled CLI application.
From the project root run:
go install
The calculator application can now be run from goworkspace/bin/basiccalculator
Once installed the calculator can be used in the command line by the following.
./basiccalculator "2+2"
This will return 4.0
The sum provided has to be in quotes and given as a string value. Spaces can be left out or included
The following are all treated as same "2 * 4", "2* 4" and "2*4"
The module can be used with the standard go get functionality. To use the calculator simply pull the calculatorservice into your project with the following.
import "github.com/kasch22/basiccalculator/calculatorservice"
The Calculator Service has two exported functions. The primary one is the CalculateString function. This takes in the sum as a string and converts it to a calculatorservice/sequence.Sequence type before calculating the value of the sum.
The CreateSequence function is available from the github.com/kasch22/basiccalculator/calculatorservice/sequence module. This will convert a string sum into a Sequence type should you wish to use this type before it being calculated.