| 1 | open Printf
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| 2 |
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| 3 | type s = { i : int; j : int }
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| 4 | let sv : s = { i = 3; j = 5 }
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| 5 | type adt =
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| 6 | I of int |
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| 7 | F of float |
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| 8 | S of s
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| 9 | let adtprt( adtv : adt ) =
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| 10 | match adtv with (* pattern matching *)
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| 11 | I i -> printf "%d\n" i |
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| 12 | F f -> printf "%g\n" f |
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| 13 | S sv -> printf "%d %d\n" sv.i sv.j
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| 14 |
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| 15 | let silly( adtv : adt ) =
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| 16 | if adtv <= F(3.5) then
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| 17 | printf "<= F\n"
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| 18 | else if adtv >= S(sv) then
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| 19 | printf ">= S\n"
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| 20 |
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| 21 | let adtv : adt = I(3) let _ = adtprt( adtv ); silly( adtv )
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| 22 | let adtv : adt = F(3.5) let _ = adtprt( adtv ); silly( adtv )
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| 23 | let adtv : adt = S(sv) let _ = adtprt( adtv ); silly( adtv )
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| 24 |
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| 25 | type week = Mon | Tue | Wed | Thu | Fri | Sat | Sun [@@deriving enumerate]
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| 26 | (* let _ = List.iter ( fun e -> printf "%d" (to_val e) ) all_of_week*)
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| 27 |
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| 28 | let day : week = Mon
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| 29 |
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| 30 | let take_class( d : week ) =
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| 31 | if d <= Fri then
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| 32 | printf "weekday\n"
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| 33 | else if d >= Sat then
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| 34 | printf "weekend\n";
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| 35 | match d with
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| 36 | Mon | Wed -> printf "CS442\n" |
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| 37 | Tue | Thu -> printf "CS343\n" |
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| 38 | Fri -> printf "Tutorial\n" |
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| 39 | _ -> printf "Take a break\n"
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| 40 |
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| 41 | let _ = take_class( Mon ); take_class( Sat );
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| 42 |
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| 43 | type weekday = Mon | Tue | Wed | Thu | Fri
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| 44 | type weekend = Sat | Sun of float
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| 45 | type week = Weekday of weekday | Weekend of weekend
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| 46 | let day : week = Weekend (Sun 3.5)
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| 47 |
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| 48 | let take_class( d : week ) =
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| 49 | if d <= Weekday Fri then
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| 50 | printf "weekday\n"
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| 51 | else if d >= Weekend Sat then
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| 52 | printf "weekend\n";
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| 53 | match d with
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| 54 | Weekday Mon | Weekday Wed -> printf "CS442\n" |
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| 55 | Weekday Tue | Weekday Thu -> printf "CS343\n" |
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| 56 | Weekday Fri -> printf "Tutorial\n" |
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| 57 | _ -> printf "Take a break\n"
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| 58 | let _ = take_class( day )
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| 59 |
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| 60 | let _ = for i = 1 to 10 do
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| 61 | printf "%d, " i
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| 62 | done
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| 63 |
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| 64 | (* Local Variables: *)
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| 65 | (* tab-width: 4 *)
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| 66 | (* compile-command: "ocaml test.ml" *)
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| 67 | (* End: *)
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