Re^3: Perl hex substraction

Replies are listed 'Best First'.
Re^4: Perl hex substraction by inkubus (Initiate) on Feb 15, 2011 at 13:20 UTC
Ok, without computer. I have a sentence with numbers like (let's forget about hex): 50 40 30 12 8 4 2 I know this is some for of an encrypted message, and to get the message decoded every number must be substracted the next one from it: `50 - 40 = 10 40 - 30 = 10 30 - 12 = 18 12 - 8 = 4 8 - 4 = 4 4 - 2 = 2 2 - 0 = 2` [download] So my result, my decoded sentence would be: 10 10 18 4 4 2 2	[reply] [d/l]
Re^5: Perl hex substraction by Corion (Patriarch) on Feb 15, 2011 at 13:28 UTC
Where do you have problems with implementing this (a bit modified) problem? Can you see a way to turn this modified problem into your original problem? A first step in solving the problem could be to get at the numbers from the string.	[reply]
Re^4: Perl hex substraction by inkubus (Initiate) on Feb 15, 2011 at 12:48 UTC
Let's say I have these hex numbers in a list or array: 4d 2c 07 2c 77 Every number in this array should be substracted from it the next one to it like: 4d - 2c = 21 so I get my result. My solved problem is that from this array I get the result of every number bring the output of substracting the next one from itself and print the result instead the original one.	[reply]
Re^5: Perl hex substraction by Corion (Patriarch) on Feb 15, 2011 at 13:05 UTC
You haven't told me how you would do it without a computer, you have just restated your problem. Describe the steps in English sentences. Fewer than 7 words per sentence. Only use simple steps. Prefer additional steps over more words.	[reply]