A query relating a function with 3 input arguments.
显示 更早的评论
My code is:
function i = Three_inputsFunction (x,y,z)
if x>y>z || y>x>z
x+y
elseif x<y<z || x<z<y
y+z
else
x+z
end
end
>> Three_inputsFunction (-18,-3,-6)
ans =
-21
Query : Why is the answer '-21' and not '-9'?
采纳的回答
"Why is the answer '-21' and not '-9'?"
Because this code
x>y>z
(x>y)>z
which (because true==1 and false==0) is equivalent to either of these
1>z
0>z
You need this instead:
x>y && y>z
Also note that you do not define the function output i.
6 个评论
Fixed it for you too:
Three_inputsFunction (-18,-3,-6)
function Three_inputsFunction(x,y,z)
if x>y && y>z || y>x && x>z
x+y
elseif x<y && y<z || x<z && z<y
y+z
else
x+z
end
end
Alek Poudel
2021-8-12
"Would you mind detailing me please."
This comparison
x>y
can return either
true
or
false
so your code (I added the parentheses for clarity, but these do not change the order of operations):
(x>y)>z
will give either of these two situations:
(true)>z
(false)>z
or using the equivalent numeric values (in MATLAB true==1 and false==0):
(1)>z
(0)>z
from which we can trivially remove the parentheses:
1>z
0>z
So you thought you were performing a comparison of three variables, but in reality you were actually just comparing z against zero or one. The rules of precedence explain why.
Alek Poudel
2021-8-12
Stephen23
2021-8-12
@Alek Poudel: you can also show your thanks by accepting my answer :)
Alek Poudel
2021-8-12
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