(@buy @sell @repair @s_repair )
%100
+20
+19
+21

[@main]
ӭ. ҿ԰ʲô?\ \
 </@buy>  \
 </@sell> 
 </@repair> \
 </@s_repair>\ 
 < /@exit>\

[@buy]
Ҫ?\ \ \
 < /@Main>

[@sell]
?\ \ \
 </@main>

[@repair]
Ҫ?\ \ \
 < /@Main>

[~@repair]
ȥѾ޺.\ \
 < /@Main>

[goods]
          5      10
ͳ        5      10
̴        5      10
ɫˮ    5      10
ɫˮ	5      10
	5      10
