BTW I was slightly inaccurate: it doesn't *require* a library to
do this, you just need to disable buffering. But the getc
function itself doing that is dependent on some library
implementation.
On Windows for example you need to call this function and turn
off line input:
https://msdn.microsoft.com/en-us/library/windows/desktop/ms686033%28v=vs.85%29.aspx
On Unix it is this family of functions:
http://linux.die.net/man/3/tcsetattr
But regardless my library does this for you, so does ncurses, and
a few others out there.
