BMI Calculator

A simple CLI tool to calculate your BMI, written in Crystal Lang.

Installation / Development

• Install using shards install
• crystal build src/bmi-cli.cr
• mv bmi-cli bin/ && mv bmi-cli.dwarf bin/

Alternatively you can use Cake (Crystal make) by just running cake

Usage

Run bin/bmi-cli --help to see help screen with all info on it.

This is run simply be accessing the class: BmiValues::Calculate.new(height, weight, units)

You can also use the tool by running a command from the binary you created (and moved). This will work like any old binary. ./bmi-cli - This will pass in all the defaults through so you can see how it works

You can pass in your own flags to input your own data

./bmi-cli imperial --height=6.5 --weight=190 --name=Jimbob

You can pass in your own flags to input your own data

./bmi-cli metric --height=1.3 --weight=80 --name=Jimbob

This should output something like...

Calculating BMI...
Your BMI is: 20.798816568047336
You're considered: Normal

There's also defaults set so that if a field is missing it'll have something to pass through Right now the defaults are;

• units -> "Imperial"
• height -> 5.11
• weight -> 180

To see all defaults run bin/bmi-cli --help.

You can change the output to fit whatever project, like a csv file for example: ./bmi-cli --height=6.5 --weight=190 >> log.csv

Development/Contributing

If you want to contribute, just make a pull request and I'll merge it in if it's relivant. I'd recommend just forking though. Feel free to extend this project however you wish

1. Fork it (https://github.com/materialfuture/bmi-cli/fork)
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request

Contributors

• @MaterialFuture - Creator and Maintainer

Notes

This is still a work in progress, I plan to add some things later on;

• Having option to specify output from the flags
• Verify the metric calculations
• Flag to specify output
• Flag for age