Chomsky文法类型判断r
r
i
cludeiostreamr
i
cludestri
gr
usi
g
amespacestdr
r
defi
eMAXS50r
i
tNONE1r
i
tRELEFT1r
stri
gstri
gs
oe
de
dr
i
tNr
r
structSTRr
r
stri
gleftr
stri
grightr
r
r
输出四元组r
voidpri
tSTRpr
r
i
tir
coute
dl