Int alpha_list (struct seat * seats) 
{
int i; 
Int v=0; 
Int valid; 
Valid=SEATONPLANE - add_empty (seats, 0); 
* * vseat=struct seat (struct seat * *) malloc (valid * sizeof (seat)); 

If (valid==0) 
Puts (" No reserved seat!" ); 
The else 
{
For (I=0; I {
If (seats [I] condition) 
{
Vseat [v]=& seats [I]; 
V++; 
} 
} 
For (int a=0; A For (int b=a + 1; B If (STRCMP (vseat [a] -> first_name, vseat [b] -> first_name)> 0) 
{
Struct seat * temp; 
Temp=vseat [a]; 
=vseat vseat [a] [b]; 
Vseat [b]=temp; 
} 
For (I=0; I Printf (" % s Seat % d: % s. \ n ", vseat [I] -> seat_number, 
Vseat [I] -> first_name, vseat [I] -> last_name); 
} 

Free (vseat); 
Return valid; 
}