1 files changed, 4 insertions, 1 deletions
diff --git a/include/brain/neuron.h b/include/brain/neuron.h
index 27d7202..1607cf0 100644
--- a/include/brain/neuron.h
+++ b/include/brain/neuron.h
@@ -9,8 +9,11 @@
 class Neuron : public NeuralNode
 {
 public:
-    virtual double activation() {}
+    Neuron(int id);
+    virtual ~Neuron() {}
+    virtual double activation() const;
 
 private:
     std::vector<std::shared_ptr<NeuralLink>> _inputLinks;
+    double sigmoid(double input) const;
 };