Help needed with fragment question

[Sarah J]

Hi

I've just started a computer course and am fairly new to VB.

My lecturer dumped this on me out of the blue, I'm not so strong at this (theory, written work) as just making, designing and testing projects. This is the sort of thing I struggle with. Any help, with answers and/or explanations will be welcome. Here is the evil problem in question:

(1)For each of the lines (A) – (E) give a condition showing when the outcome of the fragment is assigned by that line
(2)produce outcome table
(3) Make a equivalent fragment involving a single case statement of the form “if……then….else”
(4)Make a equivalent fragment involving a single case statement with five ifs

Case
	If q then case
		If p then x:=x+1				(A)
		else x:=x+2					(B)
		end-case
else case
		if r then case
			if p then x:=x+1			(C) 
			 else x:=x+2				(D)
			end-case
		else x:=x+2					(E)
end-case
end-case

Any help, any at all! (lol) will be welcome.

Thanks

[Logophobic]

First, let me rewrite that code so that it is more readable.

Case
  If q then case
    If p then x:=x+1    (A)
    else x:=x+2         (B)
    end-case
  else case
    if r then case
      if p then x:=x+1  (C)
      else x:=x+2       (D)
      end-case
    else x:=x+2         (E)
    end-case
  end-case

Now then, I don't have a clue what language this is supposed to be. Nevertheless, I can see what this should do, and can write equivalent VB code.

If q Then
  If p Then
    x = x + 1   '(A)
  Else
    x = x + 2   '(B)
  End If
Else
  If r Then
    If p Then
      x = x + 1 '(C)
    Else
      x = x + 2 '(D)
    End If
  Else
    x = x + 2   '(E)
  End If
End If

Hopefully that make more sense to you. Part (1) should be easy. For line (A) to be executed, q must be true and p must also be true. For line (B), q must be true and p must be false. And so on...
(A) q true, p true, r doesn't matter
(B) q true, p false, r doesn't matter
(C) q false, r true, p true
(D) q false, r true, p false
(E) q false, r false, p doesn't matter