4.txt

录入合法的LL(1)文法

[Terminator]
(
)
a
b
*
+
^

[NonTerminator]
E
A
T
B
F
C
P

[Starter]
E

[Precept]
E->TA
A->+E
A->@
T->FB
B->T
B->@
F->PC
C->*C
C->@
P->(E)
P->a
P->b
P->^