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

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

In C++, you can find the size of a statically allocated array using the sizeof operator. For example, sizeof(array) / sizeof(array[0]) gives you the number of elements.

What if I have a pointer to an array?

If you have a pointer, you won't be able to determine the size directly. You need to keep track of the size separately or use a container like std::vector.

Can you show me an example with a vector?

Sure! With std::vector, you can simply use the size() method. For example: std::vector<int> vec = {1, 2, 3}; int size = vec.size();.

Are there any limitations to using vectors?

Yes, while vectors are flexible, they can incur overhead due to dynamic memory allocation. For small, fixed-size arrays, regular arrays might be more efficient.