diff --git a/CM2005 Object Oriented Programming/Topic 1/1.6.5/a.exe b/CM2005 Object Oriented Programming/Topic 1/1.6.5/a.exe
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diff --git a/CM2005 Object Oriented Programming/Topic 1/1.6.5/main.cpp b/CM2005 Object Oriented Programming/Topic 1/1.6.5/main.cpp
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+++ b/CM2005 Object Oriented Programming/Topic 1/1.6.5/main.cpp	
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+#include <iostream>
+
+void printMenu()
+{
+  // 1 print help
+  std::cout << "1: Print help" << std::endl;
+  // 2 print exchange stats
+  std::cout << "2: Print exchange stats" << std::endl;
+  // 3 make an offer
+  std::cout << "3: Make an offer" << std::endl;
+  // 4 make a bid
+  std::cout << "4: Make a bid " << std::endl;
+  // 5 print wallet
+  std::cout << "5: Print wallet " << std::endl;
+  // 6 continue
+  std::cout << "6: Continue" << std::endl;
+
+  std::cout << "==========" << std::endl;
+  std::cout << "Enter an option: " << std::endl;
+}
+
+void printHelp()
+{
+  std::cout << "Help - Your aim is to analyze the market, make bid and offers and make money." << std::endl;
+}
+
+void printMarketStats()
+{
+  std::cout << "Market looks good" << std::endl;
+}
+
+void enterOffer()
+{
+  std::cout << "Make an offer - Enter the amount: " << std::endl;
+}
+
+void enterBid()
+{
+  std::cout << "Make a bid - Enter the amount: " << std::endl;
+}
+
+void printWallet()
+{
+  std::cout << "Your wallet is empty. " << std::endl;
+}
+
+void goToNextTimeFrame()
+{
+  std::cout << "Going to next time frame. " << std::endl;
+}
+
+int getUserOption()
+{
+  int userOption;
+  std::cin >> userOption;
+  std::cout << "You chose: " << userOption << std::endl;
+  return userOption;
+}
+
+void processUserOption(int userOption)
+{
+  if (userOption == 0) // bad input
+  {
+    std::cout << "Invalid choice. Choose 1-6" << std::endl;
+  }
+
+  if (userOption == 1) // Option 1 - Help
+  {
+    printHelp();
+  }
+
+  if (userOption == 2) // Option 2 - Stats
+  {
+    printMarketStats();
+  }
+
+  if (userOption == 3) // Option 3 - Offer
+  {
+    enterOffer();
+  }
+
+  if (userOption == 4) // Option 4 - Bid
+  {
+    enterBid();
+  }
+
+  if (userOption == 5) // Option 5 - Wallet
+  {
+    printWallet();
+  }
+
+  if (userOption == 6) // bad input
+  {
+    goToNextTimeFrame();
+  }
+  return;
+}
+
+int main(int argc, char const *argv[])
+{
+
+  while (true)
+  {
+    printMenu();
+    int userOption = getUserOption();
+    processUserOption(userOption);
+  }
+  return 0;
+}