How to find "n" th non repeating character in the string using C++?

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Hi, I want to find the "n"th non-repeating character in the string(Ex: 3rd non-repeating character in the string) without using any predefined methods.

What I have tried:

I tried with character array but I can't able to increment the value of the character present. Give me some solutions

Posted 15-Jul-18 2:09am

Piraisudan

Updated 15-Jul-18 2:41am

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Patrice T 15-Jul-18 11:42am

Show your code, explain problem.

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Patrice T · Answer 1 · 2018-07-15T02:42:00

Quote:
I tried with character array but I can't able to increment the value of the character present.

Show your code.

We do not do your HomeWork.
HomeWork is not set to test your skills at begging other people to do your work, it is set to make you think and to help your teacher to check your understanding of the courses you have taken and also the problems you have at applying them.
Any failure of you will help your teacher spot your weaknesses and set remedial actions.
Any failure of you will help you to learn what works and what don't, it is called 'trial and error' learning.
So, give it a try, reread your lessons and start working. If you are stuck on a specific problem, show your code and explain this exact problem, we might help.

OriginalGriff · Answer 2 · 2018-07-15T02:26:00

THis is your homework, so you'll get no code!

But, this is how I'd do it: Start by counting the characters, and storing the counts in an array which has space for each possible character. That's trivial, and takes a single pass through the input. Each time you find a new value (i.e. it has a zero count) store the location in a separate array.
You now have two arrays, and the input data: it's simple to find the "n"th singleton - the count array holds a one for it. And it's location is in the other array.

How I'd actually do it is to set up a struct to hold the char, the location, and the count, and have a single array of those instead of the two arrays above.

How to find "n" th non repeating character in the string using C++?

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