Accessing Embedded Linked Lists in C

Considering I have two structures. The first one represents a student :

typedef struct student

{
int code; // code of student
char* name;
note* list_note; // a list of his notes
struct* student next;

}

And the other one represents his notes :

typedef struct note

{

char* name // name of subject . eg:math
floate note // note at exam;
struct note* next;



}

The data file that contains information about students and their notes were stored on my computer and I was able to load them.

This is an example of the data file :

1300 david
programming 14
math 14
webmastering 18

Now I want to create a function that shows all the student who have all their notes higher than 12. I created the following code, that doesn't generate any error, but during execution it doesn't give me what I want.

Here is the code :

student* std=list_std;// list_std was declared in the functions that reads the data file and loads it;
note* nt=list_note;// list_note was declared in the functions that reads the data file and loads it;

while ( std)
{


    while (nt )
    {
        if ( std->nt->note  < 12)
        {
            break;
        }
        else
        {
            nt=nt->next
        }
    }

    printf("%s",std->name);
    std=std->next;
}