Escape code

[Rai Hardeep S.]

In C++ programming using g++ on RedHat8:

1) The vertical tab "\v" produces "stair step" like output on screen,
which it should. But diverting output to printer produces result in a
line with "inverted ?" inplace of vertical tab. How to solve this.

2) What is the purpose of escape code "\?", when we can produce same
result without "\".

Thanks in advance.

-- 
H. S. Rai