Getting terminal width in C?

Question

I\'ve been looking for a way to get the terminal width from within my C program. What I keep coming up with is something along the lines of:

#include 

        

Answer 1

So not suggesting an answer here, but:

linux-pc:~/scratch$ echo $LINES

49

linux-pc:~/scratch$ printenv | grep LINES

linux-pc:~/scratch$

Ok, and I notice that if I resize the GNOME terminal, the LINES and COLUMNS variables follow that.

Kinda seems like GNOME terminal is creating these environment variables itself?