Can you provide examples of std::array in C++17?

Can you provide examples of std::array in C++17?

Sure! In C++17, std::array is a container that encapsulates fixed size arrays. Here's a simple example:

#include <array>
#include <iostream>

int main() {
    std::array<int, 5> arr = {1, 2, 3, 4, 5};
    for (const auto& elem : arr) {
        std::cout << elem << ' ';
    }
    return 0;
}

This code initializes a std::array with 5 integers and prints them.

What are the advantages of using std::array over traditional arrays?

std::array provides several advantages:

1. It has a fixed size known at compile time.
2. It supports standard container operations like iterators.
3. It can be used with STL algorithms.
4. It provides better type safety and easier memory management.

Can you show me how to sort a std::array?

Absolutely! You can use the std::sort algorithm from the <algorithm> header. Here's an example:

#include <array>
#include <algorithm>
#include <iostream>

int main() {
    std::array<int, 5> arr = {5, 3, 1, 4, 2};
    std::sort(arr.begin(), arr.end());
    for (const auto& elem : arr) {
        std::cout << elem << ' ';
    }
    return 0;
}

This will sort the array in ascending order.

How do I access elements in a std::array?

You can access elements in a std::array using the subscript operator [] or the at() method. For example:

std::array<int, 3> arr = {10, 20, 30};
std::cout << arr[0]; // Outputs 10
std::cout << arr.at(1); // Outputs 20

The at() method also performs bounds checking.