linked list node with pointer to struct

Applications Programming
1

Suppose to have:

struct Tstudent
{
   string name, surname;

   int matriculation_num;
};

struct Tnode
{
   Tstudent* student;

   Tnodo* next;
} L;

I want to deference that "student" pointer. For example, I tried with:

*(L->student).matriculation_num

but it not worked, as terminal says:

listaStud.cc:228: error: request for member �matriculation_num' in �L->Tnodo::student', which is of non-class type �Tstudent*'

So how can I access to data contained in "student" from L ?

2

you again!

L.student->name

1 Like
3

Yeah, above... So you under stand. L is NOT a pointer, thus, the "." notation is how you "navigate" into that structure. The student member in L IS a pointer, thus, the "->" notation (which is equal to "(*x).") navigates that.

If you had:

struct test
{
  int data;
  
};

struct test2
{
  struct test *ptr;
  struct test  nonPtr;
  
};

void main()
{
  struct test2  test2Data;
  struct test2 *test2Ptr = &test2Data;

  test2Data.ptr = &test2Data.nonPtr;

  test2Data.nonPtr.data = 42;
  test2Data.ptr->data = 42;
  test2Ptr->nonPtr.data = 42;
  test2Ptr->ptr->data = 42;
}

You can see the pattern.

1 Like
4

Glad to see you too, bigearsbilly. :smiley:

Thank you guys.

5

glad to help Luke!
pointers are hard to grasp.