Help switch case problem

The requirement of this assignment is to calculate the Ideal Body Weight (IBW). The following equations are used to compute the IBW, where height is in inches and the IBW is in kilograms. The user will need to specify the gender by entering a character notation, like M/m or F/f.

What's wrong with my code? I can't run it.

gender=input('Enter the gender (F/f or M/m):');
ibwWeight=IBW*2.2046      % pounds
switch(gender)
case {'F', 'f'}
  IBW  = 45.5 + 2.3 * (Height-60);
case {'M', 'm'}
  IBW  = 50.0 + 2.3 * (Height-60);
end

fprintf('The IBW is: %.1f pounds\n',ibwWeight)

[Jan]

Please explain more details of "I can't run it". Do you get an error message, do the results differ from your expectations, do you have Matlab installed?

Answer 1

[Azzi Abdelmalek]

gender=input('Enter the gender (F/f or M/m):','s');
Height=100
switch(gender)
  case {'F', 'f'}
      IBW  = 45.5 + 2.3 * (Height-60);
  case {'M', 'm'}
      IBW  = 50.0 + 2.3 * (Height-60);
end
ibwWeight=IBW*2.2046
fprintf('The IBW is: %.1f pounds\n',ibwWeight)

[THANH NGUYEN]

what is Height=100 mean here? Thanks.

[Walter Roberson]

Your code relies on the value of a variable named "Height", so Azzi gave it an arbitrary initial value to allow the code to run.

[James]

I get an error when I run my program like this ^^^ The error is

Error using input Undefined function or variable 'M'.

Error in Lab (line 84) gender = input( 'Enter the gender: ')

I've been fiddling with it for a while and have gotten nowhere

[Azzi Abdelmalek]

If you use

gender=input('Enter the gender (F/f or M/m):');

You are expecting a string 'f/m' or 'F/M' as an input. then when you enter for example F, there will be an error. To allow entering F you to add 's' as an option in:

gender=input('Enter the gender (F/f or M/m):','s');

I don't know if you've read my answer.

Answer 2

[THANH NGUYEN]

the target weight for target bmiw. I don't know why I got the wrong pound. It should be 184.3 pounds for bmi=25, but i got 165 pounds. The third can't run due to some error which I dont know

% Prompt the user to enter a value for weight in pounds and height in inches.

Weight=input('Enter the weight in pounds:');

Height=input('Enter the height in inches:');

%Compute conversion

kiloWeight=Weight/2.2046; %kg

meterHeight=Height*2.54/100; %meters

disp(' ')

%Display BMI classification

bmi=kiloWeight/meterHeight^2;

fprintf('The BMI is: %.2f\n',bmi)

if bmi<18.5

disp('BMI classification:underweight');

elseif 18.5 <=bmi & bmi < 24.9

disp('BMI classification:Normal weight');

elseif 25 <=bmi & BMI < 29.9

disp('BMI classification:Overweight');

else

disp('BMI classification: Obese');

end

disp(' ')

% Target BMI and Weight

bmiTarget=input('Enter the target BMI:');

% Compute target weight

kilotargetWeight=bmi*meterHeight^2; %kg

%Compute Conversion

poundtargetWeight=kilotargetWeight*2.2046;

fprintf('The target weight is: %.1f pounds\n',poundtargetWeight)

disp(' ')

gender=input('Enter the gender (F/f or M/m):','s');

switch(gender)

case {'F', 'f'}

IBW = 45.5 + 2.3 * (Height-60);

case {'M', 'm'}

IBW = 50.0 + 2.3 * (Height-60);

end

fprintf('The IBW is: %.1f pounds\n',ibwWeight)