C++: Pointer vs Array

What is the difference between a pointer and an array in C++?

In C++, a pointer is a variable that holds the memory address of another variable, while an array is a collection of elements stored in contiguous memory locations.

Can you explain how to declare a pointer and an array?

Sure! To declare a pointer, you use the syntax: int* ptr; for an integer pointer. For an array, you would use: int arr[10]; for an array of 10 integers.

How do I access elements using pointers and arrays?

You can access array elements using the syntax arr[index], while for pointers, you can use *(ptr + index) to access the same elements.

Are there any performance differences between using pointers and arrays?

Yes, pointers can be more flexible and efficient in certain scenarios, especially when dealing with dynamic memory allocation, while arrays have a fixed size.