I have a mistake in loops

3 vues (au cours des 30 derniers jours)
sznailc
sznailc le 5 Nov 2021
Modifié(e) : Stephen23 le 5 Nov 2021
Hello, I have somewhere a mistake that if N = 1000 the output misses some lines (don't know which), so I suppose there's a mistake somewhere in for loops. It works correctly with N = 50, 100, 500.
function [R, I] = problem2B(N)
I = 0;
for a = 3:N
for b = a:N
for c = b:N
if (a^2 + b^2) == c^2 && a+b+c < N
R(I+1, :) = [a+b+c, a, b, c];
I = I + 1;
elseif N < 12
R = zeros(4, 1);
end
end
end
end
if N <= 50
R = reshape(nonzeros(R), I, 4);
else
R = sortrows(R, 1);
end
end
  3 commentaires
sznailc
sznailc le 5 Nov 2021
Modifié(e) : sznailc le 5 Nov 2021
I have a test file that says, that not all possible pythagorean triples are displayed with N = 1000. Therefore I think there has to be a mistake with indexes that it skips some possible triples.
Stephen23
Stephen23 le 5 Nov 2021
Modifié(e) : Stephen23 le 5 Nov 2021
Note that if you change to
R = zeros(0,4);
then you can get rid of NONZEROS and RESHAPE.

Connectez-vous pour commenter.

Réponse acceptée

Steven Lord
Steven Lord le 5 Nov 2021
Does your problem ask you to find all Pythagorean triples whose elements sum to less than 1000 or all whose elements sum to less than or equal to 1000?
  1 commentaire
sznailc
sznailc le 5 Nov 2021
wow, thank you, edited to a+b+c <= N. I couldn't tell what triple is missing and didn't know that it might be 1000

Connectez-vous pour commenter.

Plus de réponses (0)

Catégories

En savoir plus sur Operating on Diagonal Matrices dans Help Center et File Exchange

Produits


Version

R2021a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by