Arithmetic Expressions

Example: (A + B) * C + D

Ambiguous grammar:

E	→	identifier | number
OP	→	+ | - | * | /
E	→	E OP E
E	→	( E )

Unambiguous grammar:

E	→	E + T | E - T
E	→	T
T	→	T * F | T / F
T	→	F
F	→	( E )
F	→	identifier | number

E, T, F stand for expression, term, and factor.