Problem Statement

Write a function/procedure/subroutine that is called with an integer value and returns the middle three digits of the integer if possible or a clear indication of an error if this is not possible. Note: The order of the middle digits should be preserved. Your function should be tested with the following values; the first line should return valid answers, those of the second line should return clear indications of an error: Show your output on this page.

Let's start with the solution:

П0	lg	[x]	3	-	x>=0	23	ИП0	1	0
/	[x]	^	lg	[x]	10^x	П1	/	{x}	ИП1
*	БП	00	1	+	x=0	29	ИП0	С/П	0
/