module BmiCalculator

Constants

VERSION
YARD_POUND: yard-pound 703.0

Public Class Methods

calc_cm(height, weight, round=1) click to toggle source

calc bmi. @param [integer] height height(cm) @param [float] weight weight(kg) @param [integer] round round number @return [float] bmi

# File lib/bmi_calculator.rb, line 22
def self.calc_cm(height, weight, round=1)

  height_m = (height / 100.0).round(2)

  bmi = weight / (height_m * height_m)
  bmi.round(round)
end

calc_cm_g(height, weight, round=1) click to toggle source

calc bmi. @param [integer] height height(cm) @param [float] weight weight(g) @param [integer] round round number @return [float] bmi

# File lib/bmi_calculator.rb, line 35
def self.calc_cm_g(height, weight, round=1)

  height_m = (height / 100.0).round(2)
  weight_kg = (weight / 1000.0).round(1)

  bmi = weight_kg / (height_m * height_m)
  bmi.round(round)
end

calc_feet_yp(height, weight, round=1) click to toggle source

calc bmi by yard-pound. @param [integer] height height(feet) @param [float] weight weight(pound) @param [integer] round round number @return [float] bmi

# File lib/bmi_calculator.rb, line 63
def self.calc_feet_yp(height, weight, round=1)

  # convert to inch.
  height_in = BmiCalculator::Convert.feet_to_inch(height)
  # calc bmi.
  calc_inner_yp(height_in, weight, round)
end

calc_inch_yp(height, weight, round=1) click to toggle source

calc bmi by yard-pound. @param [integer] height height(inch) @param [float] weight weight(pound) @param [integer] round round number @return [float] bmi

# File lib/bmi_calculator.rb, line 76
def self.calc_inch_yp(height, weight, round=1)

  # calc bmi.
  calc_inner_yp(height * 1.0, weight, round)
end

calc_m(height, weight, round=1) click to toggle source

calc bmi. @param [float] height height(m) @param [float] weight weight(kg) @param [intenger] round round number @return [float] bmi

# File lib/bmi_calculator.rb, line 11
def self.calc_m(height, weight, round=1)

  bmi = weight / (height * height)
  bmi.round(round)
end

calc_yp(height_ft, height_in, weight, round=1) click to toggle source

calc bmi by yard-pound. @param [integer] height_ft height(feet) @param [integer] height_in height(inch) @param [float] weight weight(pound) @param [integer] round round number @return [float] bmi

# File lib/bmi_calculator.rb, line 50
def self.calc_yp(height_ft, height_in, weight, round=1)

  # 1feet = 12inch
  height = (BmiCalculator::Convert.feet_to_inch(height_ft) + height_in) * 1.0
  # calc bmi.
  calc_inner_yp(height, weight, round)
end

Private Class Methods

calc_inner_yp(height, weight, round) click to toggle source

calc bmi by yard-pound. @param [integer] height height(inch) @param [float] weight weight(pound) @param [integer] round round number @return [float] bmi

# File lib/bmi_calculator.rb, line 92
def self.calc_inner_yp(height, weight, round)

  # calc bmi.
  bmi = weight / (height * height) * YARD_POUND
  bmi.round(round)
end