diff --git a/CM2005 Object Oriented Programming/Topic 2/2.6.1/Vec3D.cpp b/CM2005 Object Oriented Programming/Topic 2/2.6.1/Vec3D.cpp
new file mode 100644
index 0000000..25defc8
--- /dev/null
+++ b/CM2005 Object Oriented Programming/Topic 2/2.6.1/Vec3D.cpp	
@@ -0,0 +1,7 @@
+#include <cmath>
+#include "Vec3D.h"
+
+int Vec3D::getLength()
+{
+  return std::sqrt((x*x + y*y + z*z));
+}
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diff --git a/CM2005 Object Oriented Programming/Topic 2/2.6.1/Vec3D.h b/CM2005 Object Oriented Programming/Topic 2/2.6.1/Vec3D.h
new file mode 100644
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+++ b/CM2005 Object Oriented Programming/Topic 2/2.6.1/Vec3D.h	
@@ -0,0 +1,12 @@
+#pragma once
+
+class Vec3D
+{
+  public:
+    int getLength();
+    int x;
+    int y;
+    int z;
+  private:
+    int size = 3;
+};
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diff --git a/CM2005 Object Oriented Programming/Topic 2/2.6.1/a.exe b/CM2005 Object Oriented Programming/Topic 2/2.6.1/a.exe
new file mode 100644
index 0000000..34a41fd
Binary files /dev/null and b/CM2005 Object Oriented Programming/Topic 2/2.6.1/a.exe differ
diff --git a/CM2005 Object Oriented Programming/Topic 2/2.6.1/test.cpp b/CM2005 Object Oriented Programming/Topic 2/2.6.1/test.cpp
new file mode 100644
index 0000000..d894151
--- /dev/null
+++ b/CM2005 Object Oriented Programming/Topic 2/2.6.1/test.cpp	
@@ -0,0 +1,27 @@
+#include <iostream>
+#include <string>
+#include <vector>
+#include <cmath>
+#include "Vec3D.h"
+
+Vec3D vec1;
+
+void doSomething()
+{
+  vec1.x = 10;
+  vec1.y = 12;
+  vec1.z = 25;
+}
+
+int main()
+{
+  doSomething();
+  
+  //std::cout << vec1.x << std::endl;
+  //std::cout << vec1.size << std::endl;
+  std::vector<Vec3D> coords;
+  coords.push_back(vec1);
+  //std::cout << coords[0].x << std::endl;
+  std::cout << coords[0].getLength() << std::endl;
+  return 0;
+}
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