From 4fbef9af49d77b57290708acc95e8e273be2115e Mon Sep 17 00:00:00 2001
From: Mark Anderson <mark@frontrangerunner.com>
Date: Mon, 10 Feb 2020 15:48:10 -0700
Subject: Challenge 47 solutions

---
 challenge-047/mark-anderson/raku/ch-1.p6 | 76 ++++++++++++++++++++++++++++++++
 challenge-047/mark-anderson/raku/ch-2.p6 | 16 +++++++
 2 files changed, 92 insertions(+)
 create mode 100644 challenge-047/mark-anderson/raku/ch-1.p6
 create mode 100644 challenge-047/mark-anderson/raku/ch-2.p6

diff --git a/challenge-047/mark-anderson/raku/ch-1.p6 b/challenge-047/mark-anderson/raku/ch-1.p6
new file mode 100644
index 0000000000..21d76f7d4a
--- /dev/null
+++ b/challenge-047/mark-anderson/raku/ch-1.p6
@@ -0,0 +1,76 @@
+#!/usr/bin/env perl6
+
+grammar Calculator {
+    rule TOP {
+        <Roman> <operator> <Roman> {
+            my $integer;
+            my $i1 = Roman_to_integer($<Roman>[0].Str, 0);
+            my $i2 = Roman_to_integer($<Roman>[1].Str, 0);
+
+            given $<operator> {
+                when '+' { $integer = $i1 + $i2 }
+                when '-' { $integer = $i1 - $i2 }
+                when 'x' { $integer = $i1 * $i2 }
+                when '/' { $integer = $i1 / $i2 }
+            }
+
+            say integer_to_Roman($integer.Int, q{});
+        }
+    }
+
+    token Roman {
+        <[IVXLCDM]>+
+    }
+ 
+    token operator {
+        <[+x/-]>
+    }
+}
+
+sub Roman_to_integer(Str $str is copy, Int $int is copy) {
+    given $str {
+        when * ~~ /^M/  { $int += 1000; $str .= subst(/^M/ , q{}) }
+        when * ~~ /^CM/ { $int += 900;  $str .= subst(/^CM/, q{}) }
+        when * ~~ /^D/  { $int += 500;  $str .= subst(/^D/ , q{}) }
+        when * ~~ /^CD/ { $int += 400;  $str .= subst(/^CD/, q{}) }
+        when * ~~ /^C/  { $int += 100;  $str .= subst(/^C/ , q{}) }
+        when * ~~ /^XC/ { $int += 90;   $str .= subst(/^XC/, q{}) }
+        when * ~~ /^L/  { $int += 50;   $str .= subst(/^L/ , q{}) }
+        when * ~~ /^XL/ { $int += 40;   $str .= subst(/^XL/, q{}) }
+        when * ~~ /^X/  { $int += 10;   $str .= subst(/^X/ , q{}) }
+        when * ~~ /^IX/ { $int += 9;    $str .= subst(/^IX/, q{}) }
+        when * ~~ /^V/  { $int += 5;    $str .= subst(/^V/ , q{}) }
+        when * ~~ /^IV/ { $int += 4;    $str .= subst(/^IV/, q{}) }
+        when * ~~ /^I/  { $int += 1;    $str .= subst(/^I/ , q{}) }
+    }
+
+    return $int unless $str;
+
+    Roman_to_integer($str, $int); 
+}
+            
+sub integer_to_Roman(Int $int is copy, Str $str is copy) {
+    given $int {
+        when * >= 1000 { $str ~= "M" ; $int -= 1000 }
+        when * >= 900  { $str ~= "CM"; $int -= 900  }
+        when * >= 500  { $str ~= "D" ; $int -= 500  }
+        when * >= 400  { $str ~= "CD"; $int -= 400  } 
+        when * >= 100  { $str ~= "C" ; $int -= 100  }
+        when * >= 90   { $str ~= "XC"; $int -= 90   }
+        when * >= 50   { $str ~= "L" ; $int -= 50   }
+        when * >= 40   { $str ~= "XL"; $int -= 40   }
+        when * >= 10   { $str ~= "X" ; $int -= 10   }
+        when * >= 9    { $str ~= "IX"; $int -= 9    }
+        when * >= 5    { $str ~= "V" ; $int -= 5    }
+        when * >= 4    { $str ~= "IV"; $int -= 4    }
+        when * >= 1    { $str ~= "I" ; $int -= 1    }
+    }
+
+    return $str unless $int;
+
+    integer_to_Roman($int, $str);
+}
+
+sub MAIN(*@args) {
+    Calculator.parse(@args.Str);
+}
diff --git a/challenge-047/mark-anderson/raku/ch-2.p6 b/challenge-047/mark-anderson/raku/ch-2.p6
new file mode 100644
index 0000000000..fa31201bb4
--- /dev/null
+++ b/challenge-047/mark-anderson/raku/ch-2.p6
@@ -0,0 +1,16 @@
+#!/usr/bin/env perl6
+
+for (100 .. Inf) -> $dividend {
+    state $count;
+
+    $dividend ~~ /^ (\d) \d+ (\d) $/;
+
+    my $divisor = $0 ~ $1;
+
+    if ($dividend %% $divisor) {
+        say $dividend;
+        $count++;
+    }
+
+    last if $count == 20;
+}
-- 
cgit