Antrian Melingkar

Antrian Melingkar
uses wincrt;
type lingkar=array[1..10] of char;
type ling=record
nilai:lingkar;
dep:integer;
bel:integer;
isi:integer;
end;
var n:integer;
antrian:ling;
{---------------------------------------------------------------------}
procedure push(var antrian:ling;x:char);
7
begin
if antrian.isi=n then write('antrian penuh')
else
begin
if antrian.bel=n then antrian.bel:=1
else antrian.bel:=antrian.bel+1;
antrian.nilai[antrian.bel]:=x;
antrian.isi:=antrian.isi+1;
end;
end;
{---------------------------------------------------------------------}
procedure pop(var antrian:ling;var x:char);
begin
if antrian.isi=0 then write('antrian kosong')
else
begin
antrian.dep:=antrian.dep+1;
if antrian.dep=n+1 then antrian.dep:=1;
x:=antrian.nilai[antrian.dep];
antrian.nilai[antrian.dep]:=' ';
antrian.isi:=antrian.isi-1;
end;
end;
{---------------------------------------------------------------------}
var i,ingin:integer;
x:char;
begin
n:=5;
i:=0;
repeat
i:=i+1;
write('antrian ke - ',i,' = ');readln(x);
push(antrian,x);
until i=n;
for i:=1 to antrian.bel do write(antrian.nilai[i],' ');
readln;
repeat
write('Anda ingin 0. Udah, 1. Push, 2. pop');readln(ingin);
if ingin<>0 then
case ingin of
1: begin
write('nilai yang akan masuk : ');readln(x);
push(antrian,x);
for i:=1 to n do
write(antrian.nilai[i],' ');
writeln;
end;
2: begin
x:=' ';
pop(antrian,x);
writeln('Data keluar = ',x);
for i:=1 to n do
write(antrian.nilai[i],' ');
writeln;
end;
end
until ingin=0;
end.