tasks a-s

Task/Number-names/ALGOL-68/number-names-1.alg

@@ -0,0 +1,38 @@
+PROC number words = (INT n)STRING:(
+  # returns a string representation of n in words. Currently
+  deals with anything from 0 to 999 999 999. #
+    []STRING digits = []STRING
+      ("zero","one","two","three","four","five","six","seven","eight","nine")[@0];
+    []STRING teens = []STRING
+      ("ten","eleven","twelve","thirteen","fourteen","fifteen","sixteen","seventeen","eighteen","nineteen")[@0];
+    []STRING decades = []STRING
+      ("twenty","thirty","forty","fifty","sixty","seventy","eighty","ninety")[@2];
+
+    PROC three digits = (INT n)STRING: (
+      # does the conversion for n from 0 to 999. #
+        INT tens = n MOD 100 OVER 10;
+        INT units = n MOD 10;
+        (n >= 100|digits[n OVER 100] + " " + "hundred" + (n MOD 100 /= 0|" and "|"")|"") +
+        (tens /= 0|(tens = 1|teens[units]|decades[tens] + (units /= 0|"-"|""))|"") +
+        (units /= 0 AND tens /= 1 OR n = 0|digits[units]|"")
+      );
+    INT m = n OVER 1 000 000;
+    INT k = n MOD 1 000 000 OVER 1000;
+    INT u = n MOD 1000;
+    (m /= 0|three digits(m) + " million"|"") +
+    (m /= 0 AND (k /= 0 OR u >= 100)|", "|"") +
+    (k /= 0|three digits(k) + " thousand"|"") +
+    ((m /= 0 OR k /= 0) AND u > 0 AND u < 100|" and " |: k /= 0 AND u /= 0|", "|"") +
+    (u /= 0 OR n = 0|three digits(u)|"")
+  );
+
+on logical file end(stand in, (REF FILE f)BOOL: GOTO stop iteration);
+on value error(stand in, (REF FILE f)BOOL: GOTO stop iteration);
+DO # until user hits EOF #
+  INT n;
+  print("n? ");
+  read((n, new line));
+  print((number words(n), new line))
+OD;
+stop iteration:
+  SKIP

Task/Number-names/ALGOL-68/number-names-2.alg

@@ -0,0 +1,89 @@
+MODE EXCEPTION = STRUCT(STRING name, PROC VOID handler);
+EXCEPTION value error = ("Value Error", stop);
+
+PROC raise = (EXCEPTION exception, STRING str error)VOID: (
+  put(stand error, (name OF exception,": ",str error, new line));
+  handler OF exception
+);
+
+MODE LINT = LONG LONG INT;
+
+BOOL locale euro := TRUE;
+
+PROC spell integer = (LINT n)STRING: (
+    []STRING tens = []STRING (~, ~, "twenty", "thirty", "forty",
+            "fifty", "sixty", "seventy", "eighty", "ninety")[@0];
+
+    []STRING small = []STRING ("zero", "one", "two", "three", "four", "five",
+             "six", "seven", "eight", "nine", "ten", "eleven",
+             "twelve", "thirteen", "fourteen", "fifteen",
+             "sixteen", "seventeen", "eighteen", "nineteen")[@0];
+
+    []STRING bl = []STRING (~, ~, "m", "b", "tr", "quadr",
+          "quint", "sext", "sept", "oct", "non", "dec")[@0];
+
+    PROC nonzero = (STRING c, LINT n)STRING:
+        IF n = 0 THEN "" ELSE c + spell integer(n) FI;
+
+    PROC big =(INT e, LINT n)STRING:
+        spell integer(n) +
+        CASE e+1 IN
+        #0# "",
+        #1# " thousand"
+        OUT
+            " " +
+            IF locale euro THEN # handle millard, billard & trillard etc #
+              bl[e OVER 2 + 1 ]+"ill" + CASE e MOD 2 IN "ard" OUT "ion" ESAC
+            ELSE
+              bl[e]+"illion"
+            FI
+        ESAC;
+
+    PROC base1000 rev = (LINT in n, PROC (INT,LINT)VOID yield)VOID: (
+        # generates the value of the digits of n in base 1000 #
+        # (i.e. 3-digit chunks), in reverse. #
+        LINT n := in n;
+        FOR e FROM 0 WHILE n /= 0 DO
+            LINT r = n MOD 1000;
+                n := n OVER 1000;
+            yield(e, r)
+        OD
+    );
+
+    IF n < 1000 THEN
+      INT ssn := SHORTEN SHORTEN n;
+      IF ssn < 0 THEN
+        raise (value error, "spell integer: negative input"); ~
+      ELIF ssn < 20 THEN
+        small[ssn]
+      ELIF ssn < 100 THEN
+        INT a = ssn OVER 10,
+            b = ssn MOD 10;
+        tens[a] + nonzero("-", b)
+      ELIF ssn < 1000 THEN
+        INT a = ssn OVER 100,
+            b = ssn MOD 100;
+        small[a] + " hundred" + ( b NE 0 | " and" | "") + nonzero(" ", b)
+      FI
+    ELSE
+        STRING out := "", sep:="";
+      # FOR     e,      x IN # base1000 rev(n, # DO #
+           (INT e, LINT x)VOID:
+                IF x NE 0 THEN
+                    big(e,x) + sep +=: out;
+                    sep := IF e = 0 AND x < 100 THEN " and " ELSE ", " FI
+                FI
+       )
+     # OD #;
+       out
+    FI
+);
+
+PROC example = (LINT n)VOID:
+  print((whole(n,0),": ", spell integer(n), new line));
+
+# examples #
+LINT prod := 0;
+FOR i TO 6 DO prod := prod * 10**i + i; example(prod) OD;
+
+example(1278); example(1572); example(2010)