diff --git a/cpp/dA.cpp b/cpp/dA.cpp
index e53d3b9..c895340 100644
--- a/cpp/dA.cpp
+++ b/cpp/dA.cpp
@@ -1,5 +1,6 @@
 #include <iostream>
 #include <math.h>
+#include "dA.h"
 using namespace std;
 
 
@@ -26,26 +27,6 @@ double sigmoid(double x) {
 }
 
 
-
-class dA {
-
-public:
-  int N;
-  int n_visible;
-  int n_hidden;
-  double **W;
-  double *hbias;
-  double *vbias;
-  dA(int, int, int , double**, double*, double*);
-  ~dA();
-  void get_corrupted_input(int*, int*, double);
-  void get_hidden_values(int*, double*);
-  void get_reconstructed_input(double*, double*);
-  void train(int*, double, double);
-  void reconstruct(int*, double*);
-};
-
-
 dA::dA(int size, int n_v, int n_h, double **w, double *hb, double *vb) {
   N = size;
   n_visible = n_v;
diff --git a/cpp/dA.h b/cpp/dA.h
new file mode 100644
index 0000000..3c931e0
--- /dev/null
+++ b/cpp/dA.h
@@ -0,0 +1,17 @@
+class dA {
+
+public:
+  int N;
+  int n_visible;
+  int n_hidden;
+  double **W;
+  double *hbias;
+  double *vbias;
+  dA(int, int, int , double**, double*, double*);
+  ~dA();
+  void get_corrupted_input(int*, int*, double);
+  void get_hidden_values(int*, double*);
+  void get_reconstructed_input(double*, double*);
+  void train(int*, double, double);
+  void reconstruct(int*, double*);
+};