% Programming Concepts for Mechanical Engineers
 
% So you want my phone number and my BMI?  How shallow can you get?
 
% Title:  Finding the body mass index of a person, classifying their health and recommending a target weight.
 
% Background:  In 1998, the federal government developed the body mass index (BMI) to determine ideal weights.  
% Body mass index is calculated as 703 times the weight in pounds divided by the square of the height in inches, 
% the obtained number is then rounded to the nearest whole number
% Hint: 23.5 will be rounded to 24; 23.1 will be rounded to 23; 23.52 will be rounded to 24).
% 
% Specifications: 
% Exercise1: Assign a value to weight in lbs, and height in inches and then calculate BMI as a rounded integer.
%Exercise 1
weight=180
height=69
bmi=weight/height^2*703.0
bmi=round(bmi)

% Exercise 2: Assign a value to weight in lbs, and height in inches and then 
% calculate BMI as a rounded integer.  
% If the BMI is not between 19 and 25 (both not included), print out a message 
% saying that “Your BMI does not correspond to a healthy weight!”.  
%If the BMI is between 19 and 25 (both inclusive), then 
%print out a message box saying, “Your BMI corresponds to a healthy weight!” 
%Exercise 2
weight=180
height=69
bmi=weight/height^2*703.0
bmi=round(bmi)
if (bmi<19 | bmi>25) 
    disp('Your BMI does not correspond to a healthy weight')
else
    disp('Your BMI corresponds to a healthy weight!')
end
 
% Exercise 3: Assign a value to weight in lbs, and height in inches and then 
% calculate BMI as a rounded integer.  Output a variable called healthy as 
%   0 if the person's BMI <19 (underweight)
%   1 if the person’s BMI is 19?BMI?25 (healthy)
%   2 if the person's BMI is 25<BMI?30 (overweight)
%   3 if the person’s BMI is >30 (obese) 
% Use fprintf command with explanation for the inputs and outputs

weight=180
height=69
bmi=weight/height^2*703.0
bmi=round(bmi)
if (bmi<19) 
    healthy=0
end
if (bmi>=19 & bmi<=25)
    healthy=1
end
if (bmi>25 & bmi<=30)
    healthy=2
end
if (bmi>30)
    healthy=3
end
fprintf('\nWeight of person =%6.2f lbs',weight)
fprintf('\nHeight of person =%6.2f inches',height)
fprintf('\nYour BMI is  =%g ',bmi)
if healthy==0
    fprintf('\n You are underweight')
end
if healthy==1
    fprintf('\n You are healthy weight')
end
if healthy==2
    fprintf('\n You are overweight')
end
if healthy==3
    fprintf('\n You are obese')
end

%Exercise 3  ALTERNATIVE
weight=180
height=69
bmi=weight/height^2*703.0
bmi=round(bmi)
if (bmi<19) 
    healthy=0
elseif (bmi>=19 & bmi<=25)
    healthy=1
elseif (bmi>25 & bmi<=30)
    healthy=2
else
    healthy=3
end
fprintf('\nWeight of person =%6.2f lbs',weight)
fprintf('\nHeight of person =%6.2f inches',height)
fprintf('\nYour BMI is  =%g ',bmi)
if healthy==0
    fprintf('\n You are underweight')
elseif healthy==1
    fprintf('\n You are a healthy weight')
elseif healthy==2
    fprintf('\n You are overweight')
elseif healthy==3
    fprintf('\n You are obese')
end

% Exercise 4: Assign a value to weight in lbs, and height in inches and then 
% calculate BMI as a rounded integer.  Output a variable called healthy as 
%       0 if the person's BMI <19 (underweight)
%       1 if the person’s BMI is 19?BMI?25 (healthy)
%       2 if the person's BMI is 25<BMI?30 (overweight)
%       3 if the person’s BMI is >30 (obese)
% Output also a variable hw for healthy weight in rounded integer lbs for all the conditions. 
% Use fprintf command with explanation for the inputs and outputs

weight=180
height=69
bmi=weight/height^2*703.0
bmi=round(bmi)
% You can use 4 separate if-end statements also.
if (bmi<19) 
    healthy=0
    hw=19*height^2/703
elseif (bmi>=19 & bmi<=25)
    healthy=1
elseif (bmi>25 & bmi<=30)
    healthy=2
    hw=25*height^2/703
else
    healthy=3
    hw=25*height^2/703
end
    hw=round(hw)
fprintf('\nWeight of person =%6.2f lbs',weight)
fprintf('\nHeight of person =%6.2f inches',height)
fprintf('\nYour BMI is  =%g ',bmi)
if healthy==0
    fprintf('\nYou are underweight.  Your target weight is =%6.0f lbs',hw)
elseif healthy==1
    fprintf('\nYou are a healthy weight.  Your target weight is =%6.0f lbs',hw)
elseif healthy==2
    fprintf('\nYou are overweight.  Your target weight is =%6.0f lbs',hw)
elseif healthy==3
    fprintf('\nYou are obese.  Your target weight is =%6.0f lbs',hw)
end