What are some examples of using std::array in C++11?

What are some examples of using std::array in C++11?

In C++11, std::array is a fixed-size array that provides better type safety and performance. Here are a few examples:

1. Basic Declaration:

   std::array<int, 5> arr = {1, 2, 3, 4, 5};
   

2. Accessing Elements:

   int first = arr[0]; // Access first element
   

3. Iterating:

   for (const auto& elem : arr) {
       std::cout << elem << " ";
   }
   

4. Size of Array:

   std::cout << "Size: " << arr.size();
   

Would you like to see more advanced examples?

Yes, can you show me how to use std::array with functions?

Certainly! Here’s how you can pass std::array to functions:

1. Passing by Reference:

   void printArray(const std::array<int, 5>& arr) {
       for (const auto& elem : arr) {
           std::cout << elem << " ";
       }
   }
   

2. Returning std::array from a Function:

   std::array<int, 5> createArray() {
       return {1, 2, 3, 4, 5};
   }
   

You can call these functions like this:

std::array<int, 5> myArray = createArray();
printArray(myArray);

That’s helpful! Can std::array be used with algorithms?

Absolutely! std::array works seamlessly with the STL algorithms. For example:

1. Sorting:

   std::array<int, 5> arr = {5, 3, 4, 1, 2};
   std::sort(arr.begin(), arr.end());
   

2. Finding an Element:

   auto it = std::find(arr.begin(), arr.end(), 3);
   if (it != arr.end()) {
       std::cout << "Found: " << *it;
   }
   

These algorithms make it easy to manipulate data in std::array!