NULL function pointers

Question

What is the behavior of calling a null function pointer?

void (*pFunc)(void) = NULL;  
pFunc();

Why is it advisable to initialize yet unu

Answer 1

In C and C++, this is called undefined behaviour, meaning that this can lead to a Segmentation fault, nothing or whatever such a case will cause based on your compiler, the operating system you're running this code on, the environment (etc...) means.

Initializing a pointer to a function, or a pointer in general to NULL helps some developers to make sure their pointer is uninitialized and not equal to a random value, thereby preventing them of dereferencing it by accident.