What is a void pointer and a null pointer?

A null pointer points has the value NULL which is typically 0, but in any case a memory location which is invalid to dereference. A void pointer points at data of type void. The word “void” is not an indication that the data referenced by the pointer is invalid or that the pointer has been nullified.

What are pointers and dangling pointers?

Dangling pointers and wild pointers in computer programming are pointers that do not point to a valid object of the appropriate type. If the program writes to memory referenced by a dangling pointer, a silent corruption of unrelated data may result, leading to subtle bugs that can be extremely difficult to find.

What is a dangling pointer in C++?

A dangling pointer is a pointer to storage that is no longer allocated. As the world’s leading example of an object-oriented programming language that does not rely on garbage collection, C++ makes it easy to create dangling pointers.

What’s the difference between null and void?

The difference between null and void as term for nothing stems from their place in physical space. A void is nothing but takes up space; null is nothing at all. In other words, you could measure a void but null offers nothing to measure.

What is the difference between void and null pointers .give suitable examples in support of your answer?

Void pointer is a specific pointer type. int, char, float, long, double are all datatypes are supported. void datatype is alone supported. Null pointer is used for assigning 0 to a pointer variable of any type.

What is the difference between null pointer and void pointer?

NULL vs Uninitialized pointer – An uninitialized pointer stores an undefined value. A null pointer stores a defined value, but one that is defined by the environment to not be a valid address for any member or object. NULL vs Void Pointer – Null pointer is a value, while void pointer is a type

How to declare a void pointer as a float pointer?

Declare a void pointer p. (int*)p = type casting of void. p = &b mean void pointer p is now float. (float*)p = type casting of void. Print the value. End. Null pointer is a pointer which points nothing.

Why can’t I do arithmetic on a void pointer?

Pointer arithmetic is not possible on pointers of void due to lack of concrete value and thus size. // void pointer variable. Refer void pointer article for details.

What happens if we initialize a pointer with null value?

Don’t initialize the pointer with some defined value e.g. NULL then it will contain some address which is invalid location now. Now, this pointer is called dangling pointer. If we process this pointer further in the program then the program will crash as it will not find valid memory.