old_location
old_location
is a global variable used to hold
the previous room the player was
in. Set by “travel” routines like
MovePlayer and DoGo after a
successful move, its value stays the same until the next successful
move. Follow.h uses it to move followers into the
room the player is in.
Hugo Homework
Code a room where an alarm is tripped if you enter from one direction but not another one.