thanx a lot

Edited by author 19.04.2010 08:32

It failed because the invalid definition of B.
You can't use a " between a pair of ", but only between a pair of '.
So you can change it to :  B='"'.
But this cause another bug, for you must output triple B in A.
So, try to add a new variable C, C="'",
and change the program a bit, and you will get AC.

Good luck~