Added dlang and made corrections to the ch-2.cpp.

3 files changed, 75 insertions, 2 deletions

diff --git a/challenge-164/deadmarshal/cpp/ch-2.cpp b/challenge-164/deadmarshal/cpp/ch-2.cpp
index c2ecc53b88..cf0ef595f1 100644
--- a/challenge-164/deadmarshal/cpp/ch-2.cpp
+++ b/challenge-164/deadmarshal/cpp/ch-2.cpp
@@ -20,8 +20,8 @@ bool is_happy(int n)
   {
     map[n]++;
     n = sum_squares(n);
-    if(n == 1) return 1;
-    if(map[n] != 0) return 0;
+    if(n == 1) return true;
+    if(map[n] != 0) return false;
   }
 }
 
diff --git a/challenge-164/deadmarshal/d/ch1.d b/challenge-164/deadmarshal/d/ch1.d
new file mode 100644
index 0000000000..329b97fd3c
--- /dev/null
+++ b/challenge-164/deadmarshal/d/ch1.d
@@ -0,0 +1,29 @@
+import std.stdio;
+import std.math:sqrt;
+
+bool is_prime(int n)
+{
+  if(n <= 1) return false;
+  for(int i = 2; i <= cast(int)sqrt(cast(float)n); ++i)
+    if(n % i == 0) return false;
+  return true;
+}
+
+int reverse_num(int n)
+{
+  int rev = 0, rem;
+  while(n)
+  {
+    rem = n % 10;
+    rev = rem + (rev * 10);
+    n /= 10;
+  }
+  return rev;
+}
+
+void main()
+{
+  foreach(int i; 1..1000)
+    if((i == reverse_num(i)) && (is_prime(i)))
+      write(i, ' ');
+}
diff --git a/challenge-164/deadmarshal/d/ch2.d b/challenge-164/deadmarshal/d/ch2.d
new file mode 100644
index 0000000000..6804a88c54
--- /dev/null
+++ b/challenge-164/deadmarshal/d/ch2.d
@@ -0,0 +1,44 @@
+import std.stdio;
+import std.math:pow;
+
+int sum_squares(int n)
+{
+  int sum = 0;
+  while(n)
+  {
+    sum += cast(int)pow(n % 10, 2);
+    n /= 10;
+  }
+  return sum;
+}
+
+bool is_happy(int n)
+{
+  int[int] map;
+  while(1)
+  {
+    map[n]++;
+    n = sum_squares(n);
+    if(n == 1) return true;
+    if(n in map) return false;
+  }
+}
+
+void happy_numbers()
+{
+  int i = 0, count = 0;
+  while(count < 8)
+  {
+    if(is_happy(i))
+    {
+      write(i, ' ');
+      count++;
+    }
+    i++;
+  }
+}
+
+void main()
+{
+  happy_numbers();
+}