Question

I listed some example code below and the question is if there is a way for the function_name to access the value of number from struct_name?

typedef struct struct_name {  
int number  
void (*func)();  
} * struct_name_ptr;  

void function_name() {  
//access number from struct  
}

main() {  
  struct_name_ptr newobject;  
  newobject->func=&function_name;  
  newobject->func(); //can it print the value of the number in the structure above?  
} 

Answer 1

Uh – no.

A struct can certainly contain a function pointer. But the function you call wouldn’t have any knowledge of the struct. Unless you passed a pointer as a function argument, or made the struct global.