diff --git a/CM2005 Object Oriented Programming/Topic 2/2.2.1/a.exe b/CM2005 Object Oriented Programming/Topic 2/2.2.1/a.exe
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diff --git a/CM2005 Object Oriented Programming/Topic 2/2.2.1/main.cpp b/CM2005 Object Oriented Programming/Topic 2/2.2.1/main.cpp
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+++ b/CM2005 Object Oriented Programming/Topic 2/2.2.1/main.cpp	
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+#include <iostream>
+#include <string>
+#include <vector>
+
+enum class Colours{blue, green, red};
+
+int main()
+{
+    //unsigned short usi=65536;
+    signed long sli=65536;
+
+    std::cout << " size of unsigned short: " << sizeof(unsigned short) << std::endl;
+    std::cout << " size of unsigned short: " << sizeof(unsigned long) << std::endl;
+    std::cout << " size of unsigned short: " << sizeof(int) << std::endl;
+    //std::cout << "i contains: " << usi << std::endl;
+    std::cout << "i contains: " << sli << std::endl;
+
+    std::cout << "--enum--" << std::endl;
+
+    std::string s = {"hello"};
+    Colours col = Colours::red;
+    //std::cout << "color is: " << col.toString() << std::endl; this doesn't work
+    return 0;
+}
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