should be it

external/duckdb/examples/embedded-c++/CMakeLists.txt

@@ -0,0 +1,10 @@
+cmake_minimum_required(VERSION 2.8.12...3.29)
+project(example-c++)
+
+set(CMAKE_CXX_STANDARD 11)
+
+include_directories(../../src/include)
+link_directories(../../build/release/src)
+
+add_executable(example main.cpp)
+target_link_libraries(example duckdb)

external/duckdb/examples/embedded-c++/main.cpp

@@ -0,0 +1,14 @@
+#include "duckdb.hpp"
+
+using namespace duckdb;
+
+int main() {
+	DuckDB db(nullptr);
+
+	Connection con(db);
+
+	con.Query("CREATE TABLE integers(i INTEGER)");
+	con.Query("INSERT INTO integers VALUES (3)");
+	auto result = con.Query("SELECT * FROM integers");
+	result->Print();
+}