Why did you open a new topic for this, you already have two topics for this same basic problem. I suggest you use one of those other topics instead of continually opening new topics for the same basic problem.
Ps. You need to re-read the instructions provided in your original topic, you're not supposed to be using C++ strings in this assignment.
The purpose of this assignment is to give you practice using dynamic memory allocation, c-string functions, sorting, and searching. You will write a spell checking program and test it.