C Language programming problem.

Hello, for some reason I have an infinite loop in the update function. I dont know how to fix it. Can you help show me other errors?

Prompt:

CODE:

#include #include

struct person { char lastName[15]; char firstName[15]; char age[4]; };

int menu (); void initialize (); void addTenRecords (); void updateRecord (); void deleteRecord (); void showContent ();

int main (void) { setbuf (stdout, NULL);

int choice; while ((choice = menu ()) != 5) { switch (choice) { case 1: initialize (); break; case 2: addTenRecords (); break; case 3: updateRecord (); break; case 4: deleteRecord (); break; default: printf ("Wrong Choice entered "); break; } }

return EXIT_SUCCESS; } int menu () { const int MAX_CHOICES = 5; const int MIN_CHOICES = 0; int choice; while (choice > MAX_CHOICES || choice

void initialize () { FILE *ptrInitial;

struct person personData = { "unassigned", "", "0" };

fflush (stdin);

if ((ptrInitial = fopen ("nameage.dat", "w")) == NULL) { printf ("Error "); } else { size_t i; for (i = 0; i

showContent (); } void addTenRecords () { FILE *ptr;

struct person personData;

if ((ptr = fopen ("nameage.dat", "a")) == NULL) { printf ("Error "); } else { size_t i; for (i = 0; i

{ printf (" Please enter first name: "); scanf ("%s", personData.firstName);

printf (" Please enter last name: "); scanf ("%s", personData.lastName);

printf (" Please enter age: "); scanf ("%s", personData.age);

fwrite (&personData, sizeof(personData), 1, ptr);

} fclose (ptr); } showContent (); } void showContent () { FILE *ptrRead;

struct person personData;

if ((ptrRead = fopen ("nameage.dat", "r")) == NULL) { printf ("Error "); } else { while ((fread (&personData, sizeof(personData), 1, ptrRead))) { printf ("%-10s%-10s%-7s ", personData.firstName, personData.lastName, personData.age); }

}

fclose (ptrRead); } void updateRecord () { FILE *ptrUpdate;

char lastName[15]; struct person personData;

if ((ptrUpdate = fopen ("nameage.dat", "r+")) == NULL) { printf ("Error "); } else { printf ("Enter the last Name of the record you want to update: "); scanf ("%s", lastName);

while ((fread (&personData, sizeof(personData), 1, ptrUpdate))) { if (strcmp (personData.lastName, lastName) == 0) { printf (" Enter first name: "); scanf ("%s", personData.firstName);

printf (" Enter last name: "); scanf ("%s", personData.lastName);

printf (" Enter age: "); scanf ("%s", personData.age);

fseek (ptrUpdate, ((-1) * (sizeof(personData))), SEEK_CUR);

fwrite (&personData, sizeof(personData), 1, ptrUpdate);

} } fclose (ptrUpdate); } showContent (); } void deleteRecord () { FILE *ptrDelete;

char lastName[15]; struct person personData;

if ((ptrDelete = fopen ("nameage.dat", "r+")) == NULL) { printf ("Error "); } else { printf ("Enter the last name: "); scanf ("%s", lastName);

while ((fread (&personData, sizeof(personData), 1, ptrDelete))) { if (strcmp (personData.lastName, lastName) == 0) { strcpy (personData.lastName, "unassigned");

strcpy (personData.firstName, "");

strcpy (personData.age, "0");

fseek (ptrDelete, ((-1) * (sizeof(personData))), SEEK_CUR);

fwrite (&personData, sizeof(personData), 1, ptrDelete);

} } fclose (ptrDelete); } showContent (); }