So if I had to declare multiple constants of the same type like the example below, is there a way to increase efficiency while cutting down the length of the code? This is for C++.
const double DISCOUNT = .2;
const double CUT_OFF = 150;
const double SHIP_CHARGE = 8.5;
const double TAX_RATE = 0.0825;
Well, you can write it like the following, but really there's no reason to:
const double DISCOUNT = .2, CUT_OFF = 150, SHIP_CHARGE = 8.5, TAX_RATE = 0.0825;
It's debatable whether it's more readable or not. I personally don't recommend it, and the C++ Core Guidelines don't recommend it either .
As a side note, you should be using constexpr
instead of const
for things like this.
Well,
#define A(b, c) const double b = c;
A(DISCOUNT, .2)
A(CUT_OFF, 150)
A(SHIP_CHARGE, 8.5)
A(TAX_RATE, .0825)
has fewer characters. But it's very hard to read indeed. From C++11 onwards prefer constexpr
to const
.
"Golfing" C++ code is never to be recommended. Write clear code.
Well, this is the way I would do it...
Instead ot T you my use something else.
using T = const double;
T DISCOUNT = .2;
T CUT_OFF = 150;
T SHIP_CHARGE = 8.5;
T TAX_RATE = 0.0825;
I also would use constexpr
but in this case const
is the same.
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