2016 Update

Task/Middle-three-digits/Maple/middle-three-digits.maple

@@ -0,0 +1,19 @@
+middleDigits := proc(n)
+	local nList, start;
+	nList := [seq(parse(i), i in convert (abs(n), string))];
+	if numelems(nList) < 3 then
+		printf ("%9a: Error: Not enough digits.", n);
+	elif numelems(nList) mod 2 = 0 then
+		printf ("%9a: Error: Even number of digits.", n);
+	else
+		start := (numelems(nList)-1)/2;
+		printf("%9a: %a%a%a", n, op(nList[start..start+2]));
+	end if;
+end proc:
+
+a := [123, 12345, 1234567, 987654321, 10001, -10001, -123, -100, 100, -12345,
+	 1, 2, -1, -10, 2002, -2002, 0]:
+for i in a do
+	middleDigits(i);
+	printf("\n");
+end do;