Haskell program, how to output structure data?

Question

Haskell

Data structure: country; reserve; number of species of rare animals in the reserve. Create two queries that allow you to display the list "Country - number of reserves" and a list of those reserves where the most rare species are.
Tell me how to display the list Country - number of reserves
Structure example
i1 = Reserves {
country = "Russia",
reserve = "RoevRuchey",
animalsCount = 8056
}

Answer 1

Let's say we have a structure:

data Struct = Constructor {
       field :: String,
       value :: Integer
              }
       deriving (Show)

Next, we initialize it with some value: Now the item name is associated with the Struct type. To get the values ​​of individual fields, you can use the names of these fields as a function (only if you use the syntax shown in the example) :
Prelude> let item = Constructor "Module" 100

Prelude> field s
"Module"
Prelude>value s 
100