Just another update

Task/Happy-numbers/MATLAB/happy-numbers.m

@@ -0,0 +1,22 @@
+function findHappyNumbers
+    nHappy = 0;
+    k = 1;
+    while nHappy < 8
+        if isHappyNumber(k, [])
+            fprintf('%d ', k)
+            nHappy = nHappy+1;
+        end
+        k = k+1;
+    end
+    fprintf('\n')
+end
+
+function hap = isHappyNumber(k, prev)
+    if k == 1
+        hap = true;
+    elseif ismember(k, prev)
+        hap = false;
+    else
+        hap = isHappyNumber(sum((sprintf('%d', k)-'0').^2), [prev k]);
+    end
+end