Solutions for Exercise 1 (1)

• 1)

• A = c { a | b }.

• A = c { a b }.

• A = { a } c { b }.

• A = c { b } b c { b } { a }.

• 2)

• Float = [ "+" | "-" ] Digit { Digit } "." Digit { Digit }

• [ "e" [ "+" | "-" ] Digit { Digit } ].

• 5)

• Result: 42

• typical mistakes:

• ts[i-1] different i (local i always 1, global i always 2)

• bar() not called