Let's dive into these pointer types with some examples:

1. Null Pointer:

A null pointer is like having an address book with no addresses. It's empty and can lead to issues if you try to read it. Printing it returns 0, like asking for information from an empty address book.

cpp
int *ptr = nullptr; // Creating a null pointer
cout << ptr; // Prints 0

2. Double Pointer: A double pointer is like having a guide (pointer) that knows the address of another guide. It's like having a manager (double pointer) who knows the address of an employee (pointer).

cpp
int i = 25;
int *p = &i;     // Pointer pointing to i's address
int **q = &p;    // Double pointer pointing to p's address

3. Void Pointer: A void pointer is like a flexible guide. It doesn't have a specific type, so it can point to any address without worrying about typecasting. It's like having a guide who can lead you to different places without needing to know what's there.

cpp
void *genericPtr; // Creating a void pointer
// It can point to int, float, char, etc., without typecasting

4. Wild Pointer: A wild pointer is like having a guide who doesn't know where they are going. It's uninitialized and can lead to unpredictable behavior. It's like following someone who doesn't have a destination in mind.

cpp
int *wildPtr; // Creating a wild pointer without initialization
// Accessing it can lead to unpredictable results