ali

printf("State: %s\n", ptemp->state);
printf("City: %s\n\n", ptemp->city);
}
else if (ptemp == NULL)
{
printf("The zip code %s was not found.\n", find);
test = 1;
}
ptemp = ptemp->link;
}
puts ("\nType 'y' if you would you like to see the entire list");
puts ("or any other key to continue>>");
if (ch == 'y' || ch == 'Y')
{
test = 1;
while (test != 0)
test = pop (pstack);
}
}
}
int pop (struct node **pstack)
{
struct node *temp;
if (is_empty(*pstack)== 1)
{
printf("\nStack is now empty");
return(0);
}
else
{
temp = *pstack;
printf("Zip Code: %s\n", temp->zip_code);
printf("State: %s\n", temp->state);
printf("City: %s\n\n", temp->city);
*pstack = (*pstack)->link;
free(temp);
return(1);
}
}
int is_empty (struct node *stack) //test if stack points to NULL
{
if (stack == NULL)
return(1); //if stack does point to NULL return 1 or true
return(0); //othrewise stack is not empty
}
void free_nodes (struct node **pstack)
{
struct node *temp; //temp pointer used for free()ing memory
while (*pstack != NULL)
{
temp = *pstack;
*pstack = (*pstack)->link;
free(temp); //release popped node's memory back to Operating System
}
}