read/write linked lists to file

#include 

#include 

typedef struct Node {

    char name[50];

    int age;

    struct Node *next;

}Node;
// user-defined functions

void printPetRecord(Node *head);

void writeToFile(FILE *fptr, Node *head);
// main()

int main(void)

{

    int count, i;

    Node *petRecord, *newRecord;

    FILE *fp;
    if( (petRecord = malloc(sizeof(Node))) == NULL )

    {

        fprintf(stderr, “Unable to allocate memory.\n”);

        exit(2);

    }

    newRecord = petRecord;

    printf(“How many pets do you have? “);

    scanf(“%d”, &count);
    for(i = 0; i < count; i++)
    {
        printf("Name of Pet: ");
        scanf("%50s", newRecord->name);

        printf(“Age of Pet: “);

        scanf(“%d”, &newRecord->age);

        if(i == count-1)

        {

            newRecord->next = NULL;

        }

        else

        {

            if( (newRecord->next = malloc(sizeof(Node))) == NULL)

            {

                fprintf(stderr, “Memory Unavailable.\n”);

                exit(3);

            }

        }

        newRecord = newRecord->next;

    }

    printf(“\n\n”);

    // Modified arguments

    printPetRecord(petRecord);
    // Open file before sending to writeToFile

    if(!(fp = fopen(“petname.txt”, “w”)))

    {

        fprintf(stderr, “Unable to open file \”petname.txt\”\n”);

        exit(1);

    }

    // Modified arguments

    writeToFile(fp, petRecord);
    fclose(fp);

    return 0;

}
// function to print linked_list

void printPetRecord(Node *head)

{

    if(head->next != NULL)

    {

        printf(“Name of Pet: %s\nAge of Pet: %d\n”, head->name, head->age);

        printPetRecord(head->next);

    }

    else

        printf(“Name of Pet: %s\nAge of Pet: %d\n”, head->name, head->age);

}
// function to print list to file

void writeToFile(FILE *fptr, Node *head)

{

    if(head->next != NULL)

    {

        fprintf(fptr, “\nPet Name: %s\nAge: %d\n\n”, head->name, head->age);

        writeToFile(fptr, head->next);

    }

    else

        fprintf(fptr, “\nPet Name: %s\nAge: %d\n\n”, head->name, head->age);

}