diff --git a/CM2005 Object Oriented Programming/Topic 3/3.3.1/a.exe b/CM2005 Object Oriented Programming/Topic 3/3.3.1/a.exe
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diff --git a/CM2005 Object Oriented Programming/Topic 3/3.3.1/test.cpp b/CM2005 Object Oriented Programming/Topic 3/3.3.1/test.cpp
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+++ b/CM2005 Object Oriented Programming/Topic 3/3.3.1/test.cpp	
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+#include <string>
+#include <iostream>
+
+int main()
+{
+  double d{}; //initializes to 0, dicated by the compiler
+  std::string s = "x1.6x";
+  try
+  {
+    d = std::stod(s);
+  }
+  catch(const std::exception& e)
+  {
+    //throw e;
+    std::cerr << e.what() << '\n';
+  }  
+  std::cout << "d: " << d << std::endl;
+  return 0;
+}
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