Raw Arrays and std::array in C++ | Modern Cpp Series Ep. 13

►Lesson Description: In this lesson I teach you our first data structure in this series, the array! Arrays are very simple but frequently used data structures. They allow us to store a collection of data in a contiguous block of memory. In modern C++ we also have the std::array container, which provides additional power and error-checking mechanisms for our array.

As a teaser, I also show you how to initialize an array using a loop, as well as with std::iota which lives in the numeric library..

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[scotto-robotto]

I really appreciate the approach you've taken here with introducing STL concepts early on, especially in such a natural way. This often feels like a rushed after thought in other tutorials I've watched.

[dino_source]

Hi Mike! Thanks for this great C++ series!
The only one minor issue I've noticed in this video: I've learned from Jason Turner's videos, that calling std::endl in a loop is considered as a bad practice. He advised to use '\n' instead, and if one really wants to flush the buffer so it would be better to use std::flush outside the loop.

[shreya_sigh]

Insightful and conceptual video, great learning ! Thank you.

[chesspool]

Enjoying the series thus far, and just subscribed to your channel

[matteusgutemberg]

Hello Mike, for the record, I'm brazilian and I'm really enjoying your lessons!
As for this one, a point raised me a doubt bc when you assigned a value outside the range previously set up to 'Ids' array, you received a 'segmentation fault' message, but in my case I didn't receive anything and it compiled well and even was able to execute. Do you know the reason of this behavior?

[kaydend]

Hey Mike. Great video!
Can you please tell us how is the I integer being able to access the elements in the array.
Thank you

[GaryChike]

Hey Mike .. really good stuff! Interestingly and by accident, I ran the iota snippet without declaring the library <iterator> for std::begin and std::end. And it compiled and ran successfully (gcc C++17). Could you verify?

[farianderson]

Is there a quick way to initialize raw arrays with a default value? Or we always have to use algorithms?

[guitart]

Hey Mike, really good video!
Question: can I use variables when defining a std::array?
I'm trying to do this, but i'm getting an error:

int user_array;
std::cout << "How many elements?" << std::endl;
std::cin >> user_array;
std::array<int, user_array> arr;

Thank you so much! <3

[swagatochatterjee]

How can std::end(ids) infer the size of the raw array when size isn't a property?

[deepblackoutlaw]

thanks for the lesson. however, why we access the first element of an array using 0 and not 1?