logger initial commit

examples/c++/logger.cxx

@@ -0,0 +1,17 @@
+#include "upm_logger.hpp"
+
+using namespace upm;
+
+int main()
+{
+
+  UPM_LOGGER::getLogLevel() = LOG_ERROR;
+
+  UPM_LOGGER().get(LOG_WARNING) << "a loop with 4 iterations";
+
+  for (int i = 0; i < 4; ++i) {
+    UPM_LOGGER().get(LOG_DEBUG) << "i = " << i;
+  }
+
+  return 0;
+}