how to compare previous and next values in MATLAB?

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Write a function called number_pattern that takes no input arguments and returns no output arguments. Instead it gets it input via the function input. It asks for a number repeatedly until the user puts in the same number twice in a row. The loop that it uses must be a while-loop. Here is an example run:
>> matching_number
Please input a number: 4
Please input number (I'm looking for a pattern): 5
Sorry, that's not what I'm looking for.
Please input number (I'm looking for a pattern): 6
Sorry, that's not what I'm looking for.
Please input number (I'm looking for a pattern): 7
Sorry, that's not what I'm looking for.
Please input number (I'm looking for a pattern): 7
That's it. Well done!
The function should behave just as in the example, using exactly the same phrasing in its output (e.g., “That’s it. Well done!”)
I tried to write code but I did not understand how can I compare previous "b" and next "b". Here is my code..
  4 Commenti
zehra ülgen
zehra ülgen il 6 Nov 2020
'number repeatedly until the user puts in the same number twice in a row'
to do that statement I should compare the previous 'b value' and new 'b value'. But when I said b == b my code is not working. How can I compare last two b value?

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Risposta accettata

Mathieu NOE
Mathieu NOE il 7 Nov 2020
hi
I believe this works :
function number_patter
b = [];
a = input ('Please input a number: ');
while 1
b = input ('Please input number (I''m looking for a pattern): ');
if a == b
fprintf('That''s it. Well done!\n');
return;
elseif b == prev_b
fprintf('That''s it. Well done!\n');
return;
else
fprintf('Sorry, that''s not what I''m looking for.\n');
end
prev_b = b;
end
  2 Commenti

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Più risposte (1)

Jon
Jon il 6 Nov 2020
You need to create a new variable, call it for example prevB. After each loop set
prevB = B
when you do your comparison compare prevB and B
Note you will need to initialize prevB before entering the loop so it is defined the first time through. Just set it to something that the user would never enter for example prevB = inf
  2 Commenti
Jon
Jon il 9 Nov 2020
You need to assign prevB = b insinde of the loop

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