Update 002_grammar_max_align_t.cpp

Author: ls-Brynn

cpp_11/002_grammar_max_align_t.cpp

@@ -1 +1,6 @@
-1
+#include <iostream>
+#include <cstddef>
+int main()
+{
+    std::cout << alignof(std::max_align_t) << '\n';
+}