How can you remove duplicate characters in a string?

Question

I have to implements a function that takes a string as an input and finds the non-duplicate character from this string.

So an an example is if I pass string str = \"

Answer 1

It sounds like homework to me, so I'm just going to describe at a high level.

• Loop over the string, examining each character
• Check if you've seen the character before
  • if you have, remove it from the string
  • if you haven't, note that you've now seen that character