local commander = require "commander"

-- This function will run when called with no parameters
commander.default_description = "Print all arguments"
commander.default_usage = "arg..."
function commander:default(...)
    for i,v in ipairs({...}) do
        print(v)
    end
end

commander.add_usage = "a b [--subtract, -s]"
commander.add_description = "Add a and b, or subtract if the subtract flag is set"
function commander:add(a, b)
    if self.subtract or self.s then
        print(a - b)
    else
        print(a + b)
    end
end

commander:run()