Error with cin.getline and while loop

#1

The code to remove duplicates takes input when there is only one test case


But when there are multiple test cases,
I am getting a segmentation error and cant take the input.

#2

Plz use cin instead of cin.getline and also in the question, you are not supposed to take the no of test cases. So plz avoid using that

#3

Hello ,
There is no question to begin with in the course.
Like I have mentioned I need multiple test cases and the input has " multiple words" .

#4

Again clarifying , it’s not about any question in the course and completely conceptual.

#5

I am not able to get your point correctly.