Merge branch 'master' into 'master'

explicitely catching domain_errors

See merge request jg943598/rpn_collab!8

src/main.cpp

@@ -16,6 +16,10 @@ int main() {
   } catch (const std::invalid_argument& e){
     std::cout << "encountered invalid argument" << e.what() << "\n";
     return -1;
+  } catch (const std::domain_error& e){
+    std::cout << "encountered div by zero" << e.what() << "\n";
+    return -1;
   }
 
+
 }