+ try {
+ result += time_lw_Q();
+ } catch (const exception &e) {
+ cout << "Error: caught exception " << e.what() << endl;
+ ++result;
+ }
+
+ try {
+ result += time_lw_Qprime();
+ } catch (const exception &e) {
+ cout << "Error: caught exception " << e.what() << endl;
+ ++result;
+ }
+