Extending a struct in C

Question

I recently came across a colleague\'s code that looked like this:

typedef struct A {
  int x;
}A;

typedef struct B {
  A a;
  int d;
}B;

void fn(){
  B *b;         


        

Answer 1

Yes, it will work. And it is one of the core principle of Object Oriented using C. See this answer 'Object-orientation in C' for more examples about extending (i.e inheritance).