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| program dvd_program;
uses crt, DOS;
const max=10;
type cpointer =^node;
pointer =^treenode;
str20 = string[10];
dvd=record
title : str20;
datenb : longint;
end;
dvdarray= array [1..max] of dvd;
node=record
name : str20;
nb,fin: integer;
add : str20;
dvds : dvdarray;
link : cpointer
end;
saved=record
name : str20;
nb,fin: integer;
add : str20;
dvds : dvdarray;
end;
treenode=record
data,adr :str20;
left,right :pointer;
num,fin :integer;
dvds :dvdarray;
end;
var head,pnew,this,before,beg :cpointer;
target,i,nodenb,totaldays :integer;
Month,Day,Year,DoW :word;
Clientfile :file of saved;
found1, found2 :boolean;
choise :char;
client :saved;
p :pointer;
procedure setwindow(ux,uy,lx,ly:byte;backgr,foregr:byte); {gia xrwmatisto menu}
begin
window(ux,uy,lx,ly);
textbackground(backgr);
textcolor(foregr);
clrscr
end;
procedure Get_Date(var year, month, day, dow: Word);
{vriskei to date}
begin
GetDate(year,month,day,dow);
Writeln('Today is ',day:0, '/', month:0, '/', year:0 );
readln;
end;
procedure display_one(dis:cpointer);
var found1 : boolean;
k:integer;
begin
readln;
found1:=false;
found2:=false;
write('The Client With Number: ');
writeln(dis^.nb);
write(' Is Called: ');
writeln(dis^.name);
write('Lives In: ');
writeln(dis^.add);
if dis^.fin<>0 then
for k:=1 to dis^.fin do
if dis^.dvds[k].title<>'' then
begin
write ('And Has Rented DVD: ');
writeln(dis^.dvds[k].title,' nb ',dis^.dvds[k].datenb);
found1:=true;
end
else writeln('The Client Hasnt Rented Any DVDs');
end;
procedure display(head:cpointer);
var dis:cpointer;
begin
clrscr;
dis:=head;
while dis<>nil do
begin
display_one(dis);
dis:=dis^.link;
end;
readln;
end;
function search(head:cpointer; target:integer; VAR this,before:cpointer):boolean;
var found:boolean; {psaxnei top linked list gia}
{ena sigekrimeno node (target)}
begin
clrscr;
found:=false;
this:=head;
If this=nil then
writeln('List is empty')
else
Repeat
If this^.nb=target then
found:=true
else
begin
before:=this;
this:=this^.link;
end;
until
(found=true) or (this=nil);
if found=true then
writeln('found')
else
writeln('not found');
search:=found;
end;
procedure create(var head:cpointer; pnew:cpointer; var i:integer);
begin
clrscr; {ftiaxnei apo tin arxh}
head:=nil;
i:=0;
repeat
i:=i+1;
new(pnew);
pnew^.nb:=i;
if (pnew^.name<> 's') and (pnew^.name<> 'S') then
begin
writeln;
writeln(' Give Clients Name: ');
readln(pnew^.name);
writeln(' Give Clients Address: ');
readln(pnew^.add);
pnew^.fin:=0;
writeln(' To Stop Press s');
writeln;
Pnew^.link:=head;
head:=pnew;
end;
until (pnew^.name='s') or (pnew^.name='S');
head:=head^.link;
i:=i-1 {just did it, dunno if it works}
end;
procedure inorder(p:pointer);
begin
if p <> nil then
begin
inorder(p^.left);
writeln(p^.data); {vgainei alfavitika}
inorder(p^.right);
end;
end;
procedure treeinsert(var p:pointer; this:cpointer);
begin
if p=nil then
begin {to vazw sto dentro gia na to kanw}
new(p);
p^.data:=this^.name;
p^.adr:=this^.add;
p^.dvds:=this^.dvds;
p^.fin:=this^.fin;
p^.num:=this^.nb;
p^.left:=nil;
p^.right:=nil;
end
else if this^.name < p^.data then
treeinsert(p^.left,this)
else if this^.name > p^.data then
treeinsert(p^.right,this);
end;
procedure add_mid(var head:cpointer; before:cpointer; this:cpointer; nb:integer);
var pnew:cpointer;
begin
new(pnew);
writeln(' Give Clients You Want To Add Name: ');
readln(pnew^.name);
writeln(' Give Clients You Want To Add Address: ');
readln(pnew^.add);
pnew^.fin:=0;
pnew^.nb:=nb;
before^.link:=pnew;
pnew^.link:=this;
end;
procedure add_by_nb;
var nb :integer;
done:boolean;
begin
this:=head;
done:=false;
nodenb:=0;
if this^.nb>1 then
begin
repeat
before :=this;
this :=this^.link;
if this^.nb < before^.nb-1 then
begin
nb:=before^.nb-1;
done:=true;
add_mid(head,before,this,nb);
end;
until (this=nil) OR (this^.nb < before^.nb-1);
end;
if done = false then
begin
writeln(head^.nb);
readln;
nb:=head^.nb+1;
new(pnew);
writeln(' Give Clients You Want To Add Name: ');
readln(pnew^.name);
writeln(' Give Clients You Want To Add Address: ');
readln(pnew^.add);
pnew^.nb:=nb;
pnew^.link:=head;
head:=pnew;
end;
end;
procedure calculate( VAR totaldays:integer; year, month, day, dow: word);
var m,days:integer;
begin
writeln(day);
totaldays:=0;
m:=0;
repeat
m:=m+1;
case m of
1,3,5,7,8,10,12: days:=31;
4,6,9,11: days:=30;
2: begin
if year mod 4=0 then
days:=28
else
days:=29;
end;
end;
totaldays:=totaldays+days;
writeln(totaldays);
until m=month;
totaldays:=totaldays-days+day;
writeln(totaldays);
end;
procedure rent_dvd(target,totaldays:integer; year, month, day, dow: word);
var k:integer;
begin
writeln('Which Client Wants To Rent A DVD? (Enter Clients Nb) ');
readln(target);
if search(head,target,this,before)=true then
begin
if this^.fin=max then
begin
writeln('You Already Have The Maximun DVD Possible');
writeln('press any key to continue...');
readkey;
end
else
begin
this^.fin:=this^.fin+1;
write ('Which DVD to rent ? ');
readln(this^.dvds[this^.fin].title);
this^.dvds[this^.fin].datenb:=totaldays;
end
end
else writeln('Client Does Not Exist');
end;
{procedure give_dvd(target:integer);
var n:char;
c:char;
begin
c:=n;
writeln('Which Client Wants To Give A DVD Back? (Enter Clients Nb) ');
readln(target);
if search(head,target,this,before)=true then
begin
if this^.nbdvd=0 then
writeln('This Client hasnt rented any dvds')
else
if this^.nbdvd=1 then
begin
writeln('Do you want to give back this DvD? (y/n) ',this^.dvd2);
readln(c);
if c = 'y' then
begin
this^.nbdvd:=0;
writeln('Job Done...');
end
end
else
if this^.nbdvd=2 then
repeat
begin
writeln('You Have Rented Two dvds, ');
writeln('If You Want To Give This dvd Back, ',this^.dvd1, 'press "a" ');
writeln('If You Want To Give This dvd Back, ',this^.dvd2, 'press "b" ');
readln(n);
end;
until n in ['a','A','b','B'];
case n of
'a','A':
begin
this^.dvd1:=this^.dvd2;
this^.nbdvd:=1;
writeln('Job Done...');
end;
'b','B':
begin
this^.nbdvd:=1;
writeln('Job Done...');
end;
end;
end
else writeln('Client Does Not Exist');
end;
}
procedure delete(var head:cpointer;var i:integer);
var this,before:cpointer;
begin
clrscr;
write('Delete Client with which number? (From Number 1 to ',i,' )'); {check it}
readln(target);
if search (head,target,this,before)=true then
begin
i:=i-1;
if head=this then
head:=head^.link
else
before^.link:=this^.link;
dispose(this);
end
else
writeln('Client Does Not Exist');
end;
{ writeln(dis^.dvds[k].title,' nb ',dis^.dvds[k].datenb);
procedure save(var head:cpointer);
var loop:integer;
begin
beg:=head;
begin
assign(Clientfile,'client.dat');
rewrite(Clientfile);
end;
loop:=0;
while beg <> nil do
begin
loop:=loop+1;
client.name:=beg^.name;
client.add:=beg^.add;
client.nb:=beg^.nb;
for i:=1 to fin do
client.dvds[i]:=beg^.dvds[i];
client.nbdvd:=beg^.nbdvd;
seek(Clientfile,loop);
write(Clientfile,client);
beg:=beg^.link;
end;
close(Clientfile);
end;
procedure load(var head:cpointer);
var loop:integer;
begin
head:=nil;
assign(Clientfile,'client.dat');
reset(Clientfile);
loop:=0;
while not eof(Clientfile) do
begin
loop:=loop+1;
seek(Clientfile,loop);
read(Clientfile,client);
new(beg);
beg^.name:=client.name;
beg^.add:=client.add;
beg^.nb:=client.nb;
beg^.dvd1:=client.dvd1;
beg^.dvd2:=client.dvd2;
beg^.nbdvd:=client.nbdvd;
beg^.link:=head;
head:=beg;
end;
end;
}
begin
clrscr;
repeat
setwindow(1,1,80,3,4,30);
writeln(' Main Menu ':44);
setwindow(1,4,80,25,0,7);
textcolor(9);
writeln('to create press ------> [c]':40);
textcolor(15);
writeln('to display press ------> [d]':40);
textcolor(5);
writeln('to search press ------> [s]':40);
textcolor(11);
writeln('to get the date press ------> [g]':40);
textcolor(5);
writeln('to rent a DVD press ------> [r]':40);
textcolor(8);
writeln('to give back a DVD press ------> [b]':40);
textcolor(12);
writeln('to add an entry press ------> [a]':40);
textcolor(13);
writeln('to erase press ------> [e]':40);
textcolor(1);
writeln('to save press ------> [i]':40);
textcolor(2);
writeln('to treeinsert press ------> [t]':40);
textcolor(7);
writeln('to load press ------> [l]':40);
textcolor(9);
writeln('to exit press ------> [x]':40);
textcolor(15);
repeat
readln(choise);
until choise in ['r','R','c','C','d','D','s','S','k','K','g','G','i','I','t','T','l','L','e','E','x','X','a','A','b','B'];
case choise of
'c','C':create(head,pnew,i);
'd','D':display(head);
's','S': begin
clrscr;
write('Client number to search for ? ');
readln(target);
search(head,target,this,before);
writeln('press any key to continue..');
readkey;
end;
'r','R': begin
Get_date(year,month,day,dow);
writeln(year,month,day);
calculate(totaldays,year,month,day,dow);
rent_dvd(target,totaldays,year,month,day,dow);
end;
'g','G':Get_Date(year,month,day,dow);
'a','A':add_by_nb;
't','T':begin
this:=head;
p:=nil; while this<>nil do
begin
treeinsert(p,this);
this:=this^.link;
end;
writeln('the inorder is: ');
inorder(p);
readln;
end;
{ 'i','I':save(head);
'l','L':load(head);
'b','B':give_dvd(target);}
'e','E':delete(head,i);
end;
until choise in ['x','X'];
readln;
END. |
[TP]Pascal dvd records program
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