What are some examples of pointer arithmetic in C++?

Can you explain pointer arithmetic in C++ with some examples?

Sure! Pointer arithmetic allows you to perform operations on pointers. For example, if you have an integer pointer, incrementing it moves the pointer to the next integer in memory.

Can you show me a code example?

Absolutely! Here's a simple example:

int arr[] = {10, 20, 30};
int* ptr = arr;

// Incrementing the pointer
ptr++;
std::cout << *ptr; // Outputs 20

What happens if I subtract two pointers?

When you subtract two pointers, it gives you the number of elements between them. For example:

int* ptr1 = &arr[0];
int* ptr2 = &arr[2];
int diff = ptr2 - ptr1; // diff will be 2

Are there any limitations to pointer arithmetic?

Yes, pointer arithmetic should only be performed within the bounds of the array. Accessing out-of-bounds memory can lead to undefined behavior.