C assign an int to a function pointer

Question

I have an function address stored in an unsigned int, and a function pointer.

Now i want that function_pointer will contain the value of function_address

unsigned int function_address = 0xdeadbeef;
void(*function_pointer)(void) = function_address; // not valid

how to do that in C ?

Answer 1

Perform an explicit cast.

void(*function_pointer)(void) = (void (*)(void))function_address;

Answer 2

Try this

typedef void(*function_pointer_type)(void)
function_pointer_type *function_pointer = (function_pointer_type *) address;