[C language] how to find index number (from 1) in new string.

Question

Example :

First, I have a string = 'stayhome'

Then, the new string is 'eomhyast'
So, the index of new string (from 1) : e = 1, o = 2, m = 3, etc.

I want the output is the index of first string, but use the sequence of the second string
So, if the string is 'stayhome', then index s = 7, t = 8, a = 6, y = 5, etc.

So, if I input :
stayhome
eomhyast

Then, the output :
7 8 6 5 4 2 3 1

Answer 1

Are you supposed to read the inputs for the 2 strings, or are they hardcoded?

I have the code ready, but I'd like to see your code first : )

Hint:
Use strchr() from <string.h>

Answer 2

Ipang that's interesting.
How didn't I thought of strchar() ?
I have used hashing instead.😅

Answer 3

Arsenic
And I have no idea how hashing is used in C LOL 😁

Answer 4

That's right NotAPythonNinja
Duplicate letter or digit in either string (with same letter cases for alphabets) is indeed not suitable for strchr().

Answer 5

Briana check this out 👇
https://code.sololearn.com/cBZam3lep7Eu/?ref=app

But as NotAPythonNinja and Ipang said, things will get different when duplicates and different case characters come into play.

For now this only works with lower case English alphabets [a-z].

Answer 6

Ipang how to find all index with strchr? I only know how to find position of a certain alphabeth

Answer 7

Ipang here is a way to get all indexes of a char in a str. You could use strchr() as well if you want to.

https://code.sololearn.com/ca12385A24A2/?ref=app

// no error check

Answer 8

Briana
Where is your code? I've been waiting ...

Use pointer arithmetic to get distance of a certain char from the string beginning. From there add 1 to the distance, because you wanted base 1 index.

I have commented the code, and made adjustments to allow duplicate letters.

https://code.sololearn.com/cNpCyPg4h0r3/?ref=app