fwriting a doubly linked list to a binary file segmentation faults

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this is my student struct with the information I read in via binary

   typedef struct student_t {

     //data in here

     } student_t;

This is what my fwrite looks like in my main. I keep getting a segmentation fault and all the examples that I have seen on how to write a doubly linked list to a binary file have you do this. So I come here for an explanation on why or maybe some changes to what I have. I also have my doubly linked list declared as listPtr in main, and my node as node.

            node = listPtr->headPtr; //segmentation faults here
            while(node!=NULL)
            {
                fwrite(node, sizeof(student_t), 1, file);
                node=node->nextPtr; 
            }

any help on why this is happening would be greatly appreciated, I have never really written to a binary file with a doubly linked list :/.

asked 27 secs ago

CodeHero

14

fwriting a doubly linked list to a binary file segmentation faults