(@buy @sell )
%100
+0
+42
[@main]
ӭҪʲô\
 </@buy> ҩƷ\
 </@sell> ҩƷ\
 < /@exit> \

[@buy]
ʲôҩƷ\ \ \
 < /@Main>

[@sell]
ҿĶ\ \ \
 < /@Main>

[goods]
ǿЧҩ            50       10
ǿЧħҩ            50       10
ҩ            50       10
ħҩ            50       10
ǿЧ̫ˮ            50       10
