(@buy @sell )
%100
+0
+42
[@main]
ӭҪʲô\
 </@buy> ҩƷ\
 ;</@sell> ҩƷ\
 < /@exit> \
[@buy]
ʲôҩƷ\ \ \
 < /@main>\
;[@sell]
;ҿĶ\ \ \
; < /@main>\
[goods]
ǿЧҩ            500       3
ǿЧħҩ            500       3
ҩ            3000       3
ħҩ            3000       3
ǿЧ̫ˮ   	       800	   3

