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| Program ex16;
uses wincrt;
type
nomb =record
v:string;
b:2..16;
end;
fich=file of nomb;
var f,f2:fich;
Procedure lecture (var x: integer);
begin
repeat
write ('donnez le nombre d"entier que vous voulez entrer ');
readln (x);
until (x in [1..200]);
end;
function verif (x:nomb;base:integer):boolean;
var
i,cpt:integer;
begin
cpt:=0;
with x do
begin
for i:=1 to length(v) do
if pos (upcase(v[i]),'0123456789ABCDEFGHIJKLMNOPQRSTVWXYZ')>base then cpt:=cpt+1;
if cpt >0 then verif :=false
else verif :=true;
end;
end;
Procedure saisie (var x:nomb);
begin
with x do
begin
repeat
write('base = ');
readln(b);
until b in [2,8,10,16];
repeat
write ('valeur = ');
readln (v);
until verif (x,b);
end;
end;
Procedure creation ( var f:fich);
var i,n:integer;
x:nomb;
begin
rewrite (f);
lecture (n);
for i:=1 to n do
begin
saisie (x);
write (f,x);
end;
end;
procedure affiche (var f:fich);
var x:nomb;
begin
reset (f);
write ('la liste des nombres triés dans l"ordre croissant : ');
while (not eof (f)) do
begin
read (f,x);
write('(',x.v,')',x.b)
end;
end;
procedure permut ( var f:fich;a,b:nomb;p:integer);
begin
reset (f);
seek (f,p-2);
write (f,b);
write (f,a)
end;
function puiss (a,b:integer):integer;
var p,i:integer;
begin
p:=1;
for i:=1 to b do
p:=p*a;
puiss:=p;
end;
procedure convb_10 (var x:nomb);
var r,e,i,s:integer;
begin
s:=0;
with x do
begin
for i:=1 to length (v) do
begin
val (v[i],r,e);
if (e<>0) then r:=ord (v[i])-55;
s:=s + r* puiss (b,length(v)-i);
end;
str(s,v);
end;
end;
procedure tri (var f,f2:fich);
var x,y:nomb;
v:boolean;
begin
reset(f);
rewrite(f2);
while (not eof (f))do
begin
read (f,x);
if (x.b)<>10 then convb_10(x);
write (f2,x);
end;
repeat
seek (f2,0);
v:=true;
while (not(filepos(f2)= filesize(f2)-1)) do
begin
read (f2,x);
read (f2,y);
if (x.v>y.v) then
begin
permut (f2,x,y,filepos (f2));
v:= true;
end;
seek (f2, filepos(f2)-1)
end;
until (v=true);
end;
procedure conv10_b(var x:nomb);
var r,y,e :integer;
c,a:string;
begin
c:='';
with x do
begin
val (v,y,e);
repeat
r:=y mod b;
y:=y div b;
str (r,a);
c:= a +c
until (y=0);
v:=c;
end;
end;
procedure transfert ( var f,f2:fich);
var x:nomb;
begin
rewrite (f);
reset(f2);
while not(eof(f2)) do
begin
read (f2,x);
if (x.b<>10) then conv10_b(x);
write (f,x);
end;
end;
begin
assign (f,'c:\nomb.txt');
assign (f2,'c:\nomb2.txt');
creation(f);
tri(f,f2);
transfert (f,f2);
affiche (f);
end. |
