(@buy @sell )
%200
+3
[@main]
ӭ. ҿ԰ʲô?\
չˮ͸ҩˮ\ \
 </@buy> ˮ \
 </@sell> ˮ\
 <ȡ/@exit>
[@buy]
Ҫˮ?\ \ \
<Ʒб/@BUY>\
 </@main>
[@sell]
ˮ?\ \ \
 </@main>
[goods]
ƻ        10       	10
        1       	1000
