Goals: Developing problem-solving and using MATLAB Someone has created the follo

Question

Goals: Developing problem-solving and using MATLAB

Someone has created the following code to display the frequency of subway trains in a terminal and the names of the train lines are A, B, C, D and E. Rewrite the code using a switch structure (rather than the nested if), but do not change the prompt. You may assume the user enters an upper case letter at the prompt.

Line = input(‘Enter the line.’,’s’)

if Line > ‘A’ & Line < ‘E’

if Line == ‘C’

disp(‘This train arrives every 12 minutes.’)

else

disp(‘This train arrives every 18 minutes.’)

end

else

if Line == ‘A’

disp(‘This train arrives every 24 minutes.’)

else

if Line ~= E

disp(‘This train is not in service.’)

else

disp(‘This train arrives every 30 minutes.’)

end

end

end

Line input Enter the line. 's') if Line IA' & Line 'E' if Line 'C' disp This train arrives every 12 minutes. else disp This train arrives every 18 minutes. end else Ar if Line disp (This train arrives every 24 minutes.') else if Line E disp T his train is not in service. else disp ('This train arrives every 30 minutes.') end end end

Explanation / Answer

Line = input('Enter the line.','s')
switch Line
case 'A'
disp('This train arrives every 24 minutes.')
case 'B'
disp('This train arrives every 18 minutes.')
case 'C'
disp('This train arrives every 12 minutes.')
case 'D'
disp('This train arrives every 18 minutes.')
case 'E'
disp('This train arrives every 30 minutes.')
otherwise
disp('This train is not in service')
end

% A - 24
% B - 18
% C - 12
% D - 18
% E - 30

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