Reference no: EM132158110
Use Haskell finish this code!
Write a Haskell function combine :: Int -> Int -> Int -> Int
with the following behavior:
• When x, y, and z all correspond to digit values (i.e., integers between 0 and 9, inclusive), combine x y z returns the integer given by the sequence of digits x y z.
(That is, x is treated as the digit in the hundreds place, y is treated as the digit in the tens place, and z is treated as the digit in the ones place.)
• In all other cases, the function returns -1.
For example, combine 4 2 8 returns 428, combine 0 3 0 returns 30 (because 030 = 30), and combine 4 12 3 returns -1.
The function should look like this
combine :: Int -> Int -> Int -> Int
combine x y z
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