How do I determine the size of an array in C++?

How do I determine the size of an array in C++?

In C++, you can determine the size of a statically allocated array using the sizeof operator. For example, if you have an array like int arr[10];, you can get its size with sizeof(arr) / sizeof(arr[0]);.

What if I have a dynamically allocated array?

For dynamically allocated arrays, you need to keep track of the size manually, as sizeof won't work. You should store the size in a separate variable when you allocate the array.

Can you show me an example of a dynamic array?

Sure! Here's a simple example:

int* arr = new int[size]; // size is the number of elements
// Remember to delete the array later
delete[] arr;

What happens if I forget to delete a dynamically allocated array?

If you forget to delete a dynamically allocated array, it will lead to a memory leak, which can consume memory resources and potentially crash your program.