Bac 2015 23/05/2015 (80%)

Program bac2015;
Uses Wincrt;
Type
  suite = Record
    dep,nb: Integer;
  End;
  tab = Array [1..30] Of suite;
Var   f: Text; p:integer; t:tab;
Procedure creation (Var f:Text);
Begin
    assign (f,'c:\bac\depart.txt');
End;
Procedure remplir (Var f:Text;var p:integer);
Var
i,n:integer;
Begin
    rewrite (f);
    Repeat
        write ('Saisir le nombre de termes: '); readln (p);
    until (p>=2) and (p<=30);
    for i:=1 to p Do
    Begin
        Repeat
            write ('Saisir un termes: '); readln (n);
        Until (2<n) and (n<1000);
        writeln (f,n);
    end;
    close (f);
End;
function convergence (x:integer):integer;
Var
i:integer;
Begin
    i:=0;
    Repeat
        if x mod 2=0 Then
            x:=x div 2
        else
            x:=3*x+1;
        i:=i+1;
    until (x=1);
    convergence:=i;
end;
Procedure traitement (Var f:Text;var t:tab;p:integer);
Var i,x,e:integer; ch:string;
Begin
    reset (f);
    i:=0;
    while not (eof(f)) do
        with t[i+1] Do
            Begin
                i:=i+1;
                readln (f,ch);
                val (ch,x,e);
                dep:=x;
                nb:=convergence(x);
            end;
            close (f);
end;
Procedure affiche (t:tab;p:integer);
Var i:integer;
Begin
  For i:=1 To p Do
    With t[i] Do
      Writeln (i,') ','Depart: ',dep,' / nb: ',nb);
End;
Begin
  creation (f);
  remplir (f,p);
  traitement(f,t,p);
  affiche(t,p);
End.