The style of code using designated initializers below belongs to C language
int widths[] = { [0] = 1, [10] = 2, [100] = 3 };
I would like to know, is there some way to write such a simple code in C++?
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Vlad from Moscow
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Vladyslav Nikolaiev
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1You mean C99 maybe ? – Feb 05 '16 at 14:16
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Yves Daoust, yes I do. – Vladyslav Nikolaiev Feb 05 '16 at 14:17
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3Using the correct term (designated initializers) would massively help searchability. And yes, you can translate this to C++, but the *actual* C++ way of writing the code would be to create a class with the appropriate logic in its constructor, not by using a raw array. – Cody Gray - on strike Feb 05 '16 at 14:17
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@CodyGray There is no any need to create a class that to use an array.:) It is just a silly idea to create a class for using an array. – Vlad from Moscow Feb 05 '16 at 14:25
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2@VladfromMoscow Some already created that class, it is called `std::vector`. – Lundin Feb 05 '16 at 14:27
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@YvesDaoust: Designated initialisers are a standard C feature. There is only one valid C standard (and yes, it was introduced with C99). – too honest for this site Feb 05 '16 at 14:28
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@Lundin You are wrong. You are trying to substitute one question for another. If I will need to use either std::vector, or std::array or some other container then I will use it. But I will not create a class that to use an array.:) – Vlad from Moscow Feb 05 '16 at 14:29
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@VladfromMoscow How am I wrong? Someone didn't create `std::vector`? – Lundin Feb 05 '16 at 14:43
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@Lundin As I said it looks like you are trying to substitute one question for another question. – Vlad from Moscow Feb 05 '16 at 14:45
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@VladfromMoscow Aaah, now I see! Half-past twelve. – Lundin Feb 05 '16 at 14:49
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@Lundin By the way after a couple of days I can become a great specialist on arrays.:) – Vlad from Moscow Feb 05 '16 at 15:00
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Additional information: http://stackoverflow.com/questions/18731707/why-does-c11-not-support-designated-initializer-list-as-c99 – Simon Kraemer Feb 05 '16 at 17:07
1 Answers
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In C++ you have to write
int widths[101] = { 1 };
widths[10] = 2;
widths[100] = 3;
Vlad from Moscow
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@PreferenceBean Yes, there is no straightforward approach to initialize an array the same way as the C allows. – Vlad from Moscow Feb 05 '16 at 15:00