How can I read a file.txt in a list/forward_list

[Oarecare]

Need this for exam !

[Thomas1965]

We are not a code writing service.
Better go to:
https://www.assignmentexpert.com/blog/do-my-c-homework/
http://www.tutorsonnet.com/c++-programming-homework-help.php

[keskiverto]

I don't think that there was a request to actually write code. More like the OP needs to know features of certain constructs. To acquire that knowledge, the OP has to read. Either what we write or what someone else has written.

Lets go for option 2 and point to:
http://www.cplusplus.com/doc/tutorial/files/
http://www.cplusplus.com/reference/list/list/
http://www.cplusplus.com/reference/forward_list/forward_list/