A-level Computing/AQA/Paper 1/Skeleton program/2018 WORDS WITH AQA

Does anyone have any tips for understanding the code and struggling with syntax? Thanks :/

How likely is it that one of the ZigZag questions will come up tomorrow?

Dude, u r talking about one. I am totally dependent upon zigzag at the moment.

I have got the 15 Zig Zag questions, I will be posting the solutions as a word document here. I can't be asked to put them on WIkibooks

Can you send me the ZigZag questions please

..

@Gxthx @AamirSonu do u guys know how to do Task 8 and Task 14?

I followed the solution for task 8:



(thanks to whoever did that!)

and haven't done 14 yet.

ahh i'm doing vb.net. if you understand the code could you please explain it?

I'll go thru it line by line from Gxthx's answer, not sure which bit you don't get so sorry if I make it too basic
Line 1 : This is the method Add - adds a new tile to the string
Line 2 : This chooses a random number between 0 and 25 inclusive - the number represents a letter from a to z (with a being 0 and z being 25)
Line 3 : This line is wrong. It should loop whilst the two ARE equal, not whilst the two are NOT equal.
Line 4 : This line is wrong. This will repeatedly add more letters to the queue instead of regenerating a random number.
Line 5 : This line is also wrong. Both lines 4 and 5 should be outside the while loop

Amended code:
Line 4 : This loops through to ensure that the chosen RandNo gives a different letter to the current last letter in the queue. The chr(n) function returns the character with the ASCII value of n (no idea what the equivalent of this in VB is). 65 is added as the character "A" has ASCII value 65, and "B" 66 and so on.
Line 5 : The RandNo is regenerated until it represents a letter different to the last letter in the queue
Line 6&7 : This is the same as before, the Rear pointer is incremented and the new letter is added to the end of the queue.

Hope this helps both of you and let me know if I'm wrong haha, I ran it once and it seemed okay but

I'll go thru it line by line from Gxthx's answer, not sure which bit you don't get so sorry if I make it too basic
Line 1 : This is the method Add - adds a new tile to the string
Line 2 : This chooses a random number between 0 and 25 inclusive - the number represents a letter from a to z (with a being 0 and z being 25)
Line 3 : This line is wrong. It should loop whilst the two ARE equal, not whilst the two are NOT equal.
Line 4 : This line is wrong. This will repeatedly add more letters to the queue instead of regenerating a random number.
Line 5 : This line is also wrong. Both lines 4 and 5 should be outside the while loop

Amended code:
Line 4 : This loops through to ensure that the chosen RandNo gives a different letter to the current last letter in the queue. The chr(n) function returns the character with the ASCII value of n (no idea what the equivalent of this in VB is). 65 is added as the character "A" has ASCII value 65, and "B" 66 and so on.
Line 5 : The RandNo is regenerated until it represents a letter different to the last letter in the queue
Line 6&7 : This is the same as before, the Rear pointer is incremented and the new letter is added to the end of the queue.

Hope this helps both of you and let me know if I'm wrong haha, I ran it once and it seemed okay but

I'm gonna let you take the lead here as I haven't had a programming teacher for my a-levels. Thanks !

No worries I thought explaining my code might be good practice for tomorrow haha good luck, can't believe you don't have a coding teacher tho thats maddd