Explain how this code on strings works, please!

Question

https://www.faceprep.in/c/remove-brackets-from-an-algebraic-string-expression/
I'm asking about the code written in C Lang.
Here I can't understand the purpose of variables c, I and j
Please explain

Answer 1

I can't copy the code from mobile browser, it's hard to look at the code in their code section which is small. Maybe you can copy the code and save a copy of it in SoloLearn for easier observation?

Follow this guide to share a saved code 👇

https://www.sololearn.com/post/75089/?ref=app