procedure Main:
  While there is data do
    Classify person

procedure Classify person:
  Read mass in kilograms
  Read height in centimeters
  Print mass, height
  If mass is valid and height is valid then
    Create body mass index as mass / height^2
    Create nutritional state as the result of classifying the body mass index
    Print body mass index, nutritional state
  Else
    Print invalid data

function Is mass valid:
  return mass > 0 and mass <= 1000

function Is height valid:
  return height > 0 and height <= 300

function Classify the body mass index (bmi):
  If bmi < 18.5 then
    return "underweight"
  If bmi < 25 then
    return "normal"
  If bmi < 30 then
    return "overweight"
  return "obese"