Added --threads option

main.cpp

@@ -11,6 +11,8 @@ int main(int argc, char *argv[])
 
   long number = 1000;
   app.add_option("-n,--number", number, "A big integer");
+  int threads=-1;
+  app.add_option("--threads", threads, "Number of Kokkos threads");
 
   CLI11_PARSE(app, argc, argv);