1 files changed, 12 insertions, 5 deletions
diff --git a/arch/x86_64/src/user/main.cpp b/arch/x86_64/src/user/main.cpp
index 747a8a4..e621327 100644
--- a/arch/x86_64/src/user/main.cpp
+++ b/arch/x86_64/src/user/main.cpp
@@ -4,22 +4,29 @@
 #include "arch/memory/heap/global_heap_allocator.hpp"
 
 #include <algorithm>
+#include <array>
 #include <atomic>
+#include <ranges>
 
 namespace teachos::arch::user
 {
   auto main() -> void
   {
+    // Test writing to VGA Buffer
     char constexpr syscall_message[] = "Successfully entered user mode and wrote to VGA buffer via syscall!";
     context_switching::syscall::syscall(context_switching::syscall::type::WRITE,
                                         {reinterpret_cast<uint64_t>(&syscall_message)});
 
-    int test = std::max(5, 10);
-    (void)test;
-
-    std::atomic<bool> locked = {false};
-    locked.exchange(true);
+    // Test C++ standard library
+    std::array<std::atomic<uint8_t>, 4> array_test = {std::atomic<uint8_t>{5}, std::atomic<uint8_t>{10},
+                                                      std::atomic<uint8_t>{15}, std::atomic<uint8_t>{20}};
+    std::ranges::for_each(array_test, [](auto & item) {
+      auto value = item.load();
+      uint8_t max_value = std::max(value, uint8_t{10});
+      item.exchange(max_value + 2);
+    });
 
+    // Test user heap
     auto address = memory::heap::global_heap_allocator::malloc(8U);
     (void)address;