Structure Records (Beginner)

[zacpack]

I want to be able to determine how many records are in a structure already.

struct carrecords
{
char make[50];
char model[50];
char yearreg[10];
char regmark[10];
char mileage[10];
char price[10];

}record[30]

How do I determine how many of record[] I've added already?

Thanks

Zac

[Shiro]

You have an array of structures. Initialize the array with NULL-pointers and add structures. If a structure will be deleted, then make this a NULL pointer. In that way you can just count the pointers not pointing to NULL.

[Prelude]

Or you could make a sentinel value that is flagged true if the record is filled, false if it isn't. This is a little bit easier than fooling around with NULL pointers.

struct Record
{
  int isFilled :1;
  int data;
} static rec[SIZE];

/* To flag true */
rec[0].isFilled = 1;

/* To check all records */
for ( i = 0; i < SIZE; i++ )
  if ( rec[i].isFilled & 1 ) flag++;

-Prelude