The confusion is from book Beginning Linux Programming by Neil Mathew and Richard Stones.
In the book using DBM they have taught how to bulid a CD application to store CD data. They have used two structs one for storing CD catalog entry and one for storing CD tracks entry.The structs are as below:
Code:
/* The catalog table */
#define CAT_CAT_LEN 30
#define CAT_TITLE_LEN 70
#define CAT_TYPE_LEN 30
#define CAT_ARTIST_LEN 70
typedef struct {
char catalog[CAT_CAT_LEN + 1];
char title[CAT_TITLE_LEN + 1];
char type[CAT_TYPE_LEN + 1];
char artist[CAT_ARTIST_LEN + 1];
} cdc_entry;
/* The tracks table, one entry per track */
#define TRACK_CAT_LEN CAT_CAT_LEN
#define TRACK_TTEXT_LEN 70
typedef struct {
char catalog[TRACK_CAT_LEN + 1];
int track_no;
char track_txt[TRACK_TTEXT_LEN + 1];
} cdt_entry;
Not exactly getting what a:
char catalog[CAT_CAT_LEN];
is meant for in cdc_entry structure As i thought earlier user will type name of the album in that field but title is there for that. Then what catalog field is meant for actually not getting. What i think of various fileds can have is:
title = name of the album(Reckless)
type = is like genere (POP, ROCK, HIPHOP)
artist = who sang the song (Bryan adams)
catalog = ?(for what this field)
If anyone has been through this book and got what this field(catalog) should actually store.
The CD application using DBM
