How to properly use arrays in C++: from static to dynamic and std::array

Hi everyone! I just started learning C++ after Python, and I have a complete mess in my head with arrays. In Python, I just wrote `arr = [1, 2, 3]` and everything worked. But here... I'm trying to make a simple program that stores 5 numbers and outputs their sum. I wrote it like this: ```cpp int arr[5]; arr = {1, 2, 3, 4, 5}; ``` But the compiler complains: "array type 'int[5]' is not assignable". Okay, I tried initializing it directly: ```cpp int arr[5] = {1, 2, 3, 4, 5}; ``` That worked. But then I needed to pass this array to a function. I wrote: ```cpp void printSum(int arr[]) { int sum = 0; for(int i = 0; i < sizeof(arr)/sizeof(arr[0]); i++) { sum += arr[i]; } cout << sum; } ``` And here's the weird thing — `sizeof(arr)` returns 8 (the size of the pointer)