Help me do a big while function

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THANH NGUYEN 2013-2-28

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Prompt the user to enter a value for height in inches (59-78). Enter zero to end.

While height not equal to zero process BMI information

Prompt the user to enter a value for weight in pounds (90-350).

For example, when run the program, it asks me to input the height in the range above. If I enter 0, the program stop. If not zero, it will start compute the bmi with the condition I created in a first part. My instructor said I have to do a big WhiLE, BUT i DON'T KNOW HOW TO DO IT. pLEASE HELP ME. tHANKS.

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Sean de Wolski 2013-2-28

As opposed to a little while?

I typically tell me wife I'll be home in a little while; I suppose she probably interprets this as a big while.

Walter Roberson 2013-2-28

Sounds like you didn't license the GOTO Toolbox.

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Answer 1

THANH NGUYEN 2013-2-28

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https://ww2.mathworks.cn/matlabcentral/answers/65397-help-me-do-a-big-while-function#answer_76929

编辑：Walter Roberson 2013-2-28

在 MATLAB Online 中打开

I add a while above of the first line of my code, but it doesn't work as I want. The below is the code for first part. The first 2 while I use or. The last while I use and. Now I have to adjust a little bit but still don't know how to do

% Prompt the user to enter a value for weight in pounds and height in inches
inches = input('Enter the height in inches (59-78): ');
while (inches <59 || inches>78)
inches=input('Enter the height in inches (59-78): ');
end
pounds = input('Enter the weight in pounds (90-350): ');
while (pounds <90 || pounds > 350)
pounds=input('Enter the weight in pounds (90-350): ');
end
% === BMI ======
% compute converstions
meters = inches * 0.0254;
kilograms = pounds / 2.2046;
% calculate BMI
bmi = kilograms / meters ^ 2;
% display BMI
fprintf('The BMI is: %.2f\n', bmi);
disp('  ')
% display BMI classification
fprintf('BMI Classification: ');
if ( bmi < 18.5)
fprintf('Underweight\n')
elseif (bmi >= 18.5 && bmi < 25)
fprintf('Normal\n')
elseif (bmi >= 25 && bmi < 30)
fprintf('Overweight\n')
else
fprintf('Obese\n')
end
% === TARGET BMI AND WEIGHT ======
% Prompt the user to enter a value for BMI
target_BMI = input('Enter the target BMI (19-25): ');
while (target_BMI <19 || target_BMI >25);
target_BMI= input('Enter the target BMI (19-25): ');
end
% compute weight
kilograms = target_BMI * meters^2;
% Compute conversions
pounds = 2.2046 * kilograms;
% display weight
fprintf('The target weight is: %.1f pounds\n\n', pounds)
% === IBW ======
%Prompt user to enter the gender (F or M)
gender = input('Is the person a female or male? Enter F or M: ','s');
while (gender ~= 'F' && gender ~= 'f' && gender ~= 'M' && gender ~= 'm')
gender = input('Is the person a female or male? Enter F or M: ','s');
end
% compute the IBW for the given height and gender
switch (gender)
case {'F','f'}
ideal = 45.5 + 2.3 * (inches-60);
case {'M','m'}
ideal = 50.0 + 2.3 * (inches-60);
end
% Convert IBW to pounds
pounds = 2.2046 * ideal;
% display IBW
fprintf('The IBW is: %.1f pounds\n\n', pounds);
    end