diff --git a/vectors.cpp b/vectors.cpp
index f5ce71e..9d9d898 100644
--- a/vectors.cpp
+++ b/vectors.cpp
@@ -1,95 +1,51 @@
 #include <iostream>
+#include "vectors.hpp"
 
-template<unsigned int NDim, typename TElem>
-class Vector {
-private:
-    TElem coord[NDim];
-public:
-    Vector() {}
-
-    Vector(const TElem initial) {
-        for(unsigned int i = 0; i < NDim; i++) {
-            coord[i] = initial;
-        }
-    }
-
-    Vector<NDim, TElem>
-    operator+ (const Vector<NDim, TElem>& other)
-    {
-        Vector<NDim, TElem> result;
-        for(unsigned int i = 0; i < NDim; i++) {
-            result[i] = this->coord[i] + other[i];
-        }
-        return result;
-    }
-
-    Vector<NDim, TElem>
-    operator+= (const Vector<NDim, TElem>& other)
-    {
-        for(unsigned int i = 0; i < NDim; i++) {
-            this->coord[i] += other[i];
-        }
-        return *this;
-    }
-
-    Vector<NDim, TElem>
-    operator- ()
-    {
-        Vector<NDim, TElem> result;
-        for(unsigned int i = 0; i < NDim; i++)
-        {
-            result[i] = -this->coord[i];
-        }
-        return result;
-    }
-
-    Vector<NDim, TElem>
-    operator*(TElem factor)
-    {
-        Vector<NDim, TElem> result;
-        for(unsigned int i = 0; i < NDim; i++) {
-            result[i] = this->coord[i] * factor;
-        }
-        return result;
-    }
-
-    TElem& operator[](const unsigned int index) {
-        return this->coord[index];
-    }
-
-    const TElem operator[](const unsigned int index) const {
-        return this->coord[index];
-    }
-};
-
-template<unsigned int NDim>
+/** A print function the Vector type
+ *
+ * this function print a vector which contains integers
+ * 
+ * @tparam NDim dimension of the Vector
+ * @param v the vector to be printed
+ */
+template<
+    unsigned int NDim
+>
 void printVector(const Vector<NDim, int> v) {
-    printf("%d", v[0]);
+    printf("Vector [ %d", v[0]);
     for(int i = 1; i < NDim; i++) {
-        printf(", %3d", v[i]);
+        printf(", %d", v[i]);
     }
-    printf("\n");
+    printf(" ] length %d\n", v.length());
+}
+
+/** A print function the Vector type
+ *
+ * this function print a vector which contains floats
+ * 
+ * @tparam NDim dimension of the Vector
+ * @param v the vector to be printed
+ */
+template<
+    unsigned int NDim
+>
+void printVector(const Vector<NDim, float> v) {
+    printf("Vector [ %.3f", v[0]);
+    for(int i = 1; i < NDim; i++) {
+        printf(", %.3f", v[i]);
+    }
+    printf(" ] length %.3f\n", v.length());
 }
 
 #define DIM 3
 
 int main( int argc, char *argv[] ) {
-    Vector<DIM,int> a(0),b(0),c(0),d(0);
-    for(int i = 0; i < DIM; i++) {
-        a[i] = 10*i;
-        b[i] = 5-i;
-    }
-
-    printVector(a);
-    printVector(b);
-
-    c = a + b;
+    Vector<3,int> a{1,2,3};
+    Vector<3,float> c;
 
+    c = a.normalize();
     printVector(c);
 
-    d = a*3 + c*4;
-
-    printVector(d);
-
-	return 0;
+    a = c;
+    printVector(a);
 }