I am new to processing, but I do have a little experience in C++. I just would like to know if it would be possible to use the Processing language to make an interactive program that allows the user to input data and would then take that data and put it in a pdf or word document? I just want to know if this is at all possible.
Yes that is possible! 
There is a Processing library that allows you to create a pdf file, with images, words and so on.
- Here is the tutorial on the Processing website
- and here is a Daniel Shiffman video where he makes a pdf file using the digits of pi (part 1).
I am not so sure about creating word documents using Processing though.