The difference between void * pointer and null pointer in C language

Void* This is not called a null pointer, which is called a pointer with no exact type. This pointer points to a piece of memory, but does not tell the program which way to interpret the memory. So this type of pointer does not directly take the action of the content. You must first turn to another type of pointer before you can interpret the content.

There is also ' a ', which is not what the null pointer refers to. ' \ s ' means the end of a string, not null.

The real null pointer is that the pointer does not point to a piece of meaningful memory, such as:
char* K;
Here the k is called a null pointer. We didn't let it point to any place.
Or
char* k = NULL;
Here the k is also called null pointer, because it points to null, which is 0, note is the integer 0, not '
A null pointer and we cannot take the content operation on it.
A null pointer can only be taken to content if it really points to a meaningful memory. That's what it is.
k = "Hello world!";
At this point k is not a null pointer.

The difference between void * pointer and null pointer in C language