typedef struct
{
long offs;
char brand[13];
char coun[15];
char mile[9];
char engn[10];
char body[15];
char year[5];
char price[10];
char flag;
}Tbase;
Tbase b;
Tbase base[24];
void b_null(Tbase *b)
{b->brand[0]=NULL;
b->coun[0]=NULL;
b->mile[0]=NULL;
b->engn[0]=NULL;
b->body[0]=NULL;
b->year[0]=NULL;
b->price[0]=NULL;
}