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Have a problem with string permutation code (C)

My String Permutation code doesn't work. If we give n to the length of the given string, the string resets every P(n,2) permutations. For example if you input "solo", after P(4,2)=12 permutations it resets to the permutation "solo" again because of the method I use. (It only works correctly with 3-character strings just because P(3,2)=6 and they have 6 permutations in total) Any Suggestions? https://code.sololearn.com/chPYpwVr8WSx/?ref=app

16th Jun 2020, 11:24 PM
Amuda Kalkan Ornitorenk
Amuda Kalkan Ornitorenk - avatar
5 Answers
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But if I do that it wont be all permutations. As you know n length word has n! permutations but my code can only print P(n,2) of them
17th Jun 2020, 6:35 AM
Amuda Kalkan Ornitorenk
Amuda Kalkan Ornitorenk - avatar
+ 1
You forgot to use perm() instead of fact() in your for loop. Tiny mistake. Everything else looks fine.
17th Jun 2020, 1:25 AM
Kevin ★
+ 1
No problem, thanks for replying my question
17th Jun 2020, 7:55 AM
Amuda Kalkan Ornitorenk
Amuda Kalkan Ornitorenk - avatar
+ 1
Hello again. I think this task is not possible using a single for loop. Of all the ways to find string permutations the Heap's algorithm seems to be the closest to your soulution. Take a look: https://en.wikipedia.org/wiki/Heap%27s_algorithm
17th Jun 2020, 5:54 PM
Kevin ★
0
Oh, I see now. I thought that was the behavior you wanted. I missunderstood your question. I'm sending you this to tell you that I won't be online for the next 10 hours and I won't be able to take a closer look to your code till then. Sorry. Hopefully someone will join this thread and help you before my return.
17th Jun 2020, 7:44 AM
Kevin â˜