Function call
cout << " Average ▁ by ▁ Standard ▁ method : ▁ " << fixed << setprecision ( 10 ) << average ( arr , N ) << endl ; cout << " Average ▁ by ▁ Efficient ▁ method : ▁ " << fixed << setprecision ( 10 ) << mean ( arr , N ) << endl ; return 0 ; }