Switch Case Construction Code help
显示 更早的评论
(Ajay deleted the question, so I (MF) am restoring it.)
I am trying to create a function that takes a cell array containing strings as an input. The string can be triangle, square, pentagon, hexagon, heptagon, octagon, nonagon, or decagon. The output is the sum of the interior angles of the requested shape. If the input is not valid, the code should return a 0. The input should be able to handle cell arrays containing multiple strings and output the corresponding angles as a vector.
I thought I got it, but then I found out I am required to use "switch case" construction, which I have no idea how to do. I tried solving it twice, and both times i got errors. Here are the 2 codes I worked out: What am I doing wrong? I tried reading on switch case construction, and I don't get what's wrong with either code?!
switch InteriorAngle(input)
case 'triangle'
disp ('180')
case 'square'
disp ('360');
case 'pentagon'
disp ('540');
case 'hexagon'
disp ('720');
case 'heptagon'
disp ('900');
case 'octagon'
disp ('1080');
case 'nonagon'
disp ('1260');
case 'decagon'
disp ('1440');
otherwise
disp ('0');
end
CODE 2
function output = InteriorAngle(input)
n=input('s')
switch InteriorAngle
case ('triangle')
n=3;
sum=(n-3).*(180)
case ('square')
n=4;
dispsum=(n-3).*(180)
case('pentagon')
n=5;
sum=(n-3).*(180)
case ('hexagon')
n=6;
sum=(n-3).*(180)
otherwise
disp ('0')
end
4 个评论
Azzi Abdelmalek
2012-10-8
what does that mean?
Walter Roberson
2012-10-8
Looks like an attempt to edit the meaningful part of a question out of existence :(
Matt Fig
2012-10-8
Ajay is particularly bad about this. I personally will be restoring what I can of his old questions and ignoring further questions from Ajay....
Matt Fig
2012-10-9
Saved from google cache:
I am trying to create a function that takes a cell array containing strings as an input. The string can be triangle, square, pentagon, hexagon, heptagon, octagon, nonagon, or decagon. The output is the sum of the interior angles of the requested shape. If the input is not valid, the code should return a 0. The input should be able to handle cell arrays containing multiple strings and output the corresponding angles as a vector.
I thought I got it, but then I found out I am required to use "switch case" construction, which I have no idea how to do. I tried solving it twice, and both times i got errors. Here are the 2 codes I worked out: What am I doing wrong? I tried reading on switch case construction, and I don't get what's wrong with either code?!
switch InteriorAngle(input) case 'triangle' disp ('180') case 'square' disp ('360'); case 'pentagon' disp ('540'); case 'hexagon' disp ('720'); case 'heptagon' disp ('900'); case 'octagon' disp ('1080'); case 'nonagon' disp ('1260'); case 'decagon' disp ('1440'); otherwise disp ('0'); end
CODE 2
function output = InteriorAngle(input) n=input('s') switch InteriorAngle case ('triangle') n=3; sum=(n-3).*(180) case ('square') n=4; dispsum=(n-3).*(180) case('pentagon') n=5; sum=(n-3).*(180) case ('hexagon') n=6; sum=(n-3).*(180) otherwise disp ('0') end
采纳的回答
Azzi Abdelmalek
2012-10-8
编辑：Azzi Abdelmalek
2012-10-8
switch input('InteriorAngle')
case 'triangle'
disp ('180')
case 'square'
disp ('360');
case 'pentagon'
disp ('540');
case 'hexagon'
disp ('720');
case 'heptagon'
disp ('900');
case 'octagon'
disp ('1080');
case 'nonagon'
disp ('1260');
case 'decagon'
disp ('1440');
otherwise
disp ('0');
end
5 个评论
because your function InteriorAngle doesn't exist . You have to create it first. Put this code in a m-file, save it with the same name of the function.
function InteriorAngle(in)
for i=1:length(in)
switch char(in(i))
case 'triangle'
disp ('180')
case 'square'
disp ('360');
case 'pentagon'
disp ('540');
case 'hexagon'
disp ('720');
case 'heptagon'
disp ('900');
case 'octagon'
disp ('1080');
case 'nonagon'
disp ('1260');
case 'decagon'
disp ('1440');
otherwise
disp ('0');
end
end
and after that you can do this:
in = cell(1,3);
in{1,1} = 'triangle';
in{1,2} = 'hexagon';
in{1,3} = 'dodecagon';
InteriorAngle(in)
as the function returns no outputs (just dips function used) you don't have to specify an output variable.
Walter Roberson
2012-10-8
You do not show any "in" in your original code.
input() as a request to the user to supply input at the command line. If the data is already in a cell array, the switch() should be on the contents of one cell, such as
switch in{K}
Azzi Abdelmalek
2012-10-8
编辑：Azzi Abdelmalek
2012-10-8
function output = InteriorAngle(s)
switch s
case ('triangle')
n=3;
sum=(n-3).*(180)
case ('square')
n=4;
dispsum=(n-3).*(180)
case('pentagon')
n=5;
sum=(n-3).*(180)
case ('hexagon')
n=6;
sum=(n-3).*(180)
otherwise
disp ('0')
end
%
InteriorAngle('triangle')
Ajay
2012-10-8
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