Found C-style array declaration in place of std::array or std::vector CXX-W2066

Arrays declared using C-style syntax can lead to problems such as buffer overflows, memory leaks, and undefined behavior. Using std::array or std::vector provides better memory management and avoids these issues.

To fix this issue, replace the C-style array declaration with std::array or std::vector, depending on the requirements of the code.

Additionally, using std::array or std::vector provides a more consistent and idiomatic C++ code style, making the code easier to read and maintain.

Bad practice

void foo() {
  int arr[5] = {1, 2, 3, 4, 5};
  // ...
}

Recommended

#include <array>

void foo() {
  std::array<int, 5> arr = {1, 2, 3, 4, 5};
  // ...
}

or

#include <vector>

void foo() {
  std::vector<int> arr = {1, 2, 3, 4, 5};
  // ...
}

For more information, refer to this link.