grammar.txt

S -> int Z
S -> float Z
S -> if J
S -> loop E
S -> out E
S -> in identifier
J -> ( E )
Z-> identifier H
H-> = E
E -> T X
T -> ( E )
T -> M Y
M -> id K
M -> identifier K
K -> == F
K -> <= F
K -> >= F
K -> != F
K -> ''
F -> id
F -> identifier 
X -> + E
X -> - E
X -> | E
X -> ''
Y -> * T
Y -> / T
Y -> & T
Y -> ''