In C, what is the difference between `&function` and `function` when passed as arguments?

Question

For example:

#include 

typedef void (* proto_1)();
typedef void proto_2();

void my_function(int j){
    printf(\"hello from function. I got          


        

Answer 1

The difference is only stylistic. You have the same scenario when using function pointers:

void func (void);

...

void(*func_ptr)(void) = func;

func_ptr();    // call func
(*func_ptr)(); // call func

printf("%d\n", ptr); 
printf("%d\n", *ptr);

There are some who say that the (*func_ptr)() syntax is to prefer, to make it clear that the function call is done through a function pointer. Others believe that the style with the * is clearer.

As usual, there are likely no scientific studies proving that either form is better than the other, so just pick one style and stick to it.