Book 02, chapter 3 examples fix

Author: Artiom N.

src/book02/ch03/cpp/accept_pool/main.cpp

@@ -23,7 +23,7 @@ extern "C"
 #include <boost/asio.hpp>
 
 
-const auto clients_count = 3;
+constexpr auto clients_count = 3;
 
 
 int main(int argc, const char *const argv[])

src/book02/ch03/cpp/mt_server/main.cpp

@@ -29,7 +29,7 @@ extern "C"
 
 
 #if !defined(MAX_PATH)
-#    define MAX_PATH (256)
+#    define MAX_PATH 256
 #endif