program menu;
uses crt;
Const
   abc = ['a'..'z','A'..'Z','1'..'9'];
   Maxsize=100;{Maximalnoe 4islo}
var
   nom1:integer; {nomer vybrannoj zada4i}
   nom2:integer; {nomer metoda vvoda}
   nom4: integer;{nomer zadaniya v 3 zada4e}
   i:integer; {s4et4ik}
   j:integer; {s4et4ik}
   fl:text;
   name:string;
   vyxod:string[3];
   {pervaya zada4a}
   n1: integer;{Koli4estvo el-tov v massive}
   K1: integer;{s4et4ik}
   a1: array [1..maxsize] of real;{isxodniy massiv}
   P1: real;{rabo4aya peremennaya}
   kol1: integer;{koli4estvo perestanovok}
   {vtoraya zada4a}
   n2: integer;{4islo strok}
   m2: integer;{4islo stolbcov}
   a2: array[1..maxsize,1..maxsize] of real;{isxodniy massiv}
   s2_: real;{summa}
   {tret'ya zada4a}
   a3: array[1..10] of string [8];
   a3_1: array[1..10] of integer;
   a3_2: array[1..10] of string [8];
   k3:integer;
   p3: longint;
   s:string;
   s1,s2:string;
   n3,x3:longint;
   res3: string;
   res3_6: longint;
   res3_7: boolean;
   res3_9: integer;
   {4etvertaya zada4a}
   s_res, prev, word: string;{rabo4ie stroki}
   count, n4: integer;
   p4: integer;{rabo4aya peremennaya}
   s4: string;{isxodnaya stroka}
   stnew: string;{stroka rezultata}

Function StrUpper(s: String): String; {funkciya perevoda}
Var                                   {stroki v verhniy}
   i: Byte;                               {registr}
Begin
   For i := 1 To Ord(s[0]) Do
      Case s[i] Of
         'a' .. 'z': s[i] := Chr(Ord(s[i])-$20); {Chr-vozvrawaet kod}
         #160 .. #175: s[i] := Chr(Ord(s[i])-$20);{po simvolu,Ord-simvol po kodu}
         #224 .. #239: s[i] := Chr(Ord(s[i])-$50);{cifri-raznost kodov v verhnem i nijn.registre}
      End;
   StrUpper := s
End;
Function StrOneSpace(s: String): String;{funkciya udaleniya}
Var                                     {liwnix probelov}
   p: Byte;
Begin
   Repeat
      p := Pos('  ', s);
      If p > 0 Then
         Delete(s, p, 1)
   Until p = 0;
   StrOneSpace := s;
End;
var
   a4: array[1..10] of string [8];
function from_(s:string;ss:byte):longint;{funkciya perexoda iz stroki v 4islo}
var
   q:longint;
begin
   q:=0;
   for i:=1 to length(s) do
   begin
      s[i]:=char(ord(s[i]) or 32);
      case s[i] of
         '0'..'9': q:=q*ss+byte(s[i])-ord('0');
         'a'..'z': q:=q*ss+byte(s[i])-ord('a')+10;
      end;
   end;
   from_:=q;
end;
function to_(q:longint;ss:byte):string;{funkciya perexoda iz 4isla v stroku}
var
   s:string;
   i:longint;
begin
   s:='';
   repeat
      i:=q-trunc(q/ss)*ss;
      if i>9 then
         i:=i+ord('A')-ord('9')-1;
      s:=chr(i+ord('0'))+s;
      q:=trunc(q/ss);
   until q=0;
   to_:=s;
end;
function MulHexToHex(s1,s2:string):string;{umnojenie v 16}
begin
   MulHexToHex:=to_(from_(s1,16)*from_(s2,16),16);
end;
function DivHexToHex(s1,s2:string):string; {delenie v 16}
begin
   DivHexToHex:=to_(from_(s1,16) div from_(s2,16),16);
end;
function AddHexToHex(s1,s2:string):string; {slojenie}
begin
   addHexToHex:=to_(from_(s1,16) +from_(s2,16),16);
end;
function vich(s1,s2:string):string;{vi4itanie}
begin
   vich:=to_(from_(s1,16)- from_(s2,16),16);
end;
function BinToHex(s:string):string;{iz 2 v 16}
begin
   BinToHex:=to_(from_(s,2),16);
end;
function check_hex(s: string): boolean;{funkciya pravilnosti zapisi}
var
   i: byte;
   flag: boolean;
begin
   i := 1;
   flag := true;
   while (i <= length(s)) and flag do
   begin
      flag := (upcase(s[i]) in ['0' .. '9', 'A' .. 'F']); inc(i)
   end;
   check_hex := flag
end;
function proverka(s: string): boolean;{yavlyaetsya li 2-im}
var
   i: byte;
   flag: boolean;
begin
   i := 1;
   flag := true;
   while (i <= length(s)) and flag do
   begin
      flag :=s[i] in ['0' .. '1'];
      inc(i)
   end;
   proverka := flag
end;
Function Hex2Dec (s:string): longint;{iz 16 v 10}
var
   res,k: longint;
   r,i: integer;
   c: char;
begin
   res := 0;
   k := 1;
   for i := length (s) downto 1 do
   begin
      c := UpCase (s[i]);
      case c of
         'A'..'F': r := ord(c) - (ord('A') - 10);    { ord (c) - 55 }
         '0'..'9': r := ord(c) - ord('0');           { ord (c) - 48 }
      else break
      end;
      res := res + r * k;
      k := k * 16;
   end;
   Hex2Dec := res;
end;
function Dec2Hex(n: integer): string; {Perevod iz 10-oy v 16-uu}
var
   r: integer; {ostatok ot deleniya 4isla na osnovanie}
   buf: string[1];
begin
   s:='';
   repeat
      r:=n mod 16; {o4erednaya cifra}
      n:=n div 16; {celaya 4ast deleniya}
      if r< 10 then
         buf:=chr(r+48) {chr(48) = '0', chr(49)='1' i t.d}
      else
         buf:=chr(r+55);{chr(65)= 'A', chr(66)='b' i t.d}
      s:=buf+s;
   until (n<16);
   if n<>0 then
   begin
      if n<10 then
         buf:=chr(n+48)
      else
         buf:=chr(n+55);
      s:=buf+s;
   end;
   Dec2Hex:=s;
end;
function stepen(x,n:longint):integer; {vozvedenie v stepen}
begin
   stepen:=Trunc(exp(n*ln(x)));
end;
function Ravno(s1,s2:string):boolean;
begin
   Ravno:=from_(s1,16)=from_(s2,16);
end;
function Neravno(s1,s2:string):boolean;
begin
   Neravno:=not(from_(s1,16)=from_(s2,16));
end;
function Bolwe(s1,s2:string):boolean;
begin
   Bolwe:=from_(s1,16)>from_(s2,16);
end;
function Menwe(s1,s2:string):boolean;
begin
   Menwe:=from_(s1,16)<from_(s2,16);
end;
function Menwe_ili_ravn(s1,s2:string):boolean;
begin
   Menwe_ili_ravn:=from_(s1,16)<=from_(s2,16);
end;
function Bolwe_ili_ravn(s1,s2:string):boolean;
begin
   Bolwe_ili_ravn:=from_(s1,16)>=from_(s2,16);
end;
label
   perexod00,perexod01,perexod02,perexod03,perexod04,perexod05,perexod06,
   perexod07,perexod08,perexod10,perexod09,perexod11,metka_vyxod, vyx; {vozvrat k vyboru
                                 punkta menu v slu4ae owibo4nogo vvoda}
BEGIN
   textbackground(black);
   clrscr;
   perexod00:BEGIN
   textcolor(lightgreen);
   writeln('MENU:');
   writeln;
   writeln('1.Odnomernye massivy.');     {vyvod}
   writeln('2.Dvumernyj massivy.');      {isxodnogo}
   writeln('3.Podprogrammy.');           {menu na}
   writeln('4.Stroki.');                 {ekran}
   writeln('5.Vyxod.');                  {monitora}
   writeln;
   writeln('vyberite nuzhnyj punkt MENU i nazhmite enter');
   writeln;
   read(nom1);
   textbackground(black);
   clrscr;
   perexod01:BEGIN
   textcolor(lightcyan);
   CASE (nom1) of
      1: BEGIN  {pervaya zada4a}
            writeln;
            writeln ('zada4a 1:');
            writeln;
            highvideo;
            writeln('Dana posledovatelnost 4isel a1,a2,...,an.Trebuetsya');
            writeln('perestavit 4isla v poryadke vozrastaniya.Dlya etogo');
            writeln('sravnivautsya dva sosednix 4isla ai i ai+1.Esli ai>ai+1,');
            writeln('to delaetsya perestanovka.Tak prodoljaetsya do tex');
            writeln('por,poka vse elementi ne stanut raspolojeni v poryadke');
            writeln('vozrastaniya.Sostavit algoritm sortirovki,pods4itivaya');
            writeln('pri etom koli4estvo perestanovok.');
            normvideo;
            writeln;
            writeln('1. S klaviatury');
            writeln('2. Iz fajla');
            writeln('3. S4et4ik slu4ajnyx 4isel');
            writeln('4. Vyxod');
            writeln;
            highvideo;
            writeln('vyberite metod vvoda i nazhmite enter');
            normvideo;
            writeln;
            readln(nom2);
            textcolor(green);
            textbackground(black);
            CASE (nom2) of {vybor vvoda v pervoj zada4e}
               1: BEGIN
                     clrscr;
                     repeat
                        Write('Vvedite 4islo el-tov massiva: ');
                        Readln(n1);
                        if (n1<=0) or (n1>maxsize) then
                        begin
                           writeln;
                           textcolor(lightred);
                           writeln('OWIBKA!Povtorite');
                           textcolor(green);
                           writeln;
                        END; {if}
                     until (n1<=maxsize) and (n1>=1);
                     for i:=1 to n1 do
                     begin
                        Write(i,'-y element: ');
                        readln(a1[i]);
                     end;
                  END; {vvod s klaviatury}
               2: BEGIN
                     clrscr;
                     write('vvedite imya fajla: ');
                     readln(name);
                     assign(fl,name);
                     {$I-}
                     reset(fl);
                     {$I+}
                     if ioresult=0 then
                     BEGIN
                        repeat
                           read(fl,n1);
                           writeln('4islo elementov massiva: ',n1:3);
                           if (n1>maxsize) or (n1<1) then
                           begin
                              writeln;
                              textcolor(lightred);
                              writeln('OWIBKA!Povtorite');
                              textcolor(green);
                              writeln;
                           END; {if}
                        until (n1<=maxsize) and (n1>=1);
                        for i:=1 to n1 do
                        begin

                           read(fl,a1[i]);
                           Write(i,'-y element: ');
                           writeln(a1[i]:4:1);
                        end;
                        close(fl);
                     END
                     else
                     BEGIN
                        writeln ('fajl ',name,' ne najden');
                        goto vyx;
                     END;
                  END; {vvod iz fajla}
               3: BEGIN
                     clrscr;
                     randomize;
                     repeat
                        write('4islo elementov massiva: ');
                        n1:=random(100)-50;
                        writeln(n1);
                        if (n1>maxsize) or (n1<1) then
                        begin
                           writeln;
                           textcolor(lightred);
                           writeln('OWIBKA!Povtorite');
                           textcolor(green);
                           writeln;
                        END; {if}
                     until (n1<=maxsize) and (n1>=1);
                     for i:=1 to n1 do
                     begin
                        a1[i]:=random(100);
                        Write(a1[i]:6:1);
                     end;
                  END; {s4et4ik slu4ajnyx 4isel}
               4: goto vyx;
            else
            BEGIN
               clrscr;
               textcolor(lightred);
               writeln('OWIBKA! Vyberite odin iz predlozhennyx punktov');
               textcolor(cyan);
               goto perexod01;
            END;{else}
            END; {metody vvoda v pervoj zada4e}
            {rewenie pervoj zada4i}
            kol1:=0;
            repeat
               K1:=0;
               for i:=1 to n1-1 do
               begin
                  if a1[i]> a1[i+1] then
                  begin
                     P1:=a1[i];
                     a1[i]:=a1[i+1];
                     a1[i+1]:=p1;
                     k1:=k1+1;
                     kol1:=kol1+1;
                  end;
               end;
            until k1=0;
            Writeln;
            Writeln('Polu4enniy');
            for i:=1 to n1 do
               Write(a1[i]:6:1);
            writeln;
            Writeln('4islo povtoreniy ravno: ',kol1);
            writeln;
            writeln;
            end;
      2: BEGIN  {vtoraya zada4a}
            writeln;
            writeln ('zada4a 2:');
            writeln;
            highvideo;
            writeln('Matrica A[N,M] (M kratno 4) razdelena po vertikali');
            writeln('na 2 polovini.Opredelit summu elementov kajdogo');
            writeln('stolbca levoy polovini i summu elementov kajdogo');
            writeln('4etnogo stolbca pravoy polovini matrici A.');
            normvideo;
            writeln;
            writeln('1. S klaviatury');
            writeln('2. Iz fajla');
            writeln('3. S4et4ik slu4ajnyx 4isel');
            writeln('4. Vyxod.');
            writeln;
            highvideo;
            writeln('vyberite metod vvoda i nazhmite enter');
            normvideo;
            writeln;
            readln(nom2);
            textcolor(lightmagenta);
            textbackground(black);
            CASE (nom2) of {vybor vvoda vo vtoroj zada4e}
               1:BEGIN
                    clrscr;
                    repeat
                       Write('Zadayte 4islo strok v matrice: ');
                       Readln(n2);
                       if (n2>maxsize) or (n2<1) then
                       begin
                          writeln;
                          textcolor(lightred);
                          writeln('OWIBKA!Povtorite');
                          textcolor(lightmagenta);
                          writeln;
                        END; {if}
                    until (n2>0) and (n2<=maxsize);
                    repeat
                       Write('Zadayte 4islo stolbcov v matrice: ');
                       Readln(m2);
                       if ((m2 mod 4)<> 0) then
                       begin
                          writeln;
                          textcolor(lightred);
                          writeln('OWIBKA!Ne kratno 4');
                          textcolor(lightmagenta);
                          writeln;
                       END; {if}
                       if (m2>maxsize) or (m2<1) then
                       begin
                          writeln;
                          textcolor(lightred);
                          writeln('OWIBKA!Povtorite');
                          textcolor(lightmagenta);
                          writeln;
                       END; {if}
                    until (m2>0) and (m2<=maxsize) and ((m2 mod 4) = 0);
                    Write('Zadayte el-ti matrici po');
                    Writeln(' strokam 4erez probel ');
                    for i:=1 to n2 do
                    begin
                       Write('Stroka ',I,': ');
                       for j:=1 to m2 do
                          read(a2[i,j]);
                          readln;
                    END;
                    end;
               2: BEGIN
                     clrscr;
                     write('vvedite imya fajla: ');
                     readln(name);
                     assign(fl,name);
                     {$I-}
                     reset(fl);
                     {$I+}
                     if ioresult=0 then
                     BEGIN
                        repeat
                           read(fl,n2);
                           writeln('koli4estvo strok v matrice: ',n2);
                           if (n2>maxsize) or (n2<1) then
                           begin
                              writeln;
                              textcolor(lightred);
                              writeln('OWIBKA!Povtorite');
                              textcolor(lightmagenta);
                              writeln;
                           END; {if}
                        until (n2>0) and (n2<=maxsize);
                        repeat
                           read(fl,m2);
                           writeln('koli4estvo stolbcov v matrice: ',m2);
                           if ((m2 mod 4)<> 0) then
                           begin
                              writeln;
                              textcolor(lightred);
                              writeln('OWIBKA!Ne kratno 4');
                              textcolor(lightmagenta);
                              writeln;
                           END; {if}
                           if (m2>maxsize) or (m2<1) then
                           begin
                              writeln;
                              textcolor(lightred);
                              writeln('OWIBKA!Povtorite');
                              textcolor(lightmagenta);
                              writeln;
                           END; {if}
                        until (m2>0) and (m2<=maxsize) and ((m2 mod 4) = 0);
                        {vvod matricy po strokam}
                        for i:=1 to n2 do
                        BEGIN
                           Write('Stroka ',I,': ');
                           for j:=1 to m2 do
                           BEGIN
                              read(fl,a2[i,j]);
                              write(a2[i,j]:4:0);
                           END; {for}
                           writeln;
                        END; {for}
                        close(fl);
                      END
                      else
                      BEGIN
                         writeln ('fajl ',name,' ne najden');
                         goto vyx;
                      END;
                 END;
               3:BEGIN
                    clrscr;
                    randomize;
                    repeat
                       n2:=random(25)-5;
                       writeln('4islo strok v matrice: ',n2:2);
                       if (n2>maxsize) or (n2<1) then
                       begin
                          writeln;
                          textcolor(lightred);
                          writeln('OWIBKA!Povtorite');
                          textcolor(lightmagenta);
                          writeln;
                       END; {if}
                    until (n2>0) and (n2<=maxsize);
                    repeat
                       m2:=random(25)-5;
                       writeln('4islo stolbcov v matrice: ',m2:2);
                       if ((m2 mod 4)<> 0) then
                       begin
                          writeln;
                          textcolor(lightred);
                          writeln('OWIBKA!Ne kratno 4');
                          textcolor(lightmagenta);
                          writeln;
                       END; {if}
                       if (m2>maxsize) or (m2<1) then
                       begin
                          writeln;
                          textcolor(lightred);
                          writeln('OWIBKA!Povtorite');
                          textcolor(lightmagenta);
                          writeln;
                       END; {if}
                    until (m2>0) and (m2<=maxsize) and ((m2 mod 4) = 0);
                    Write('Zadayte el-ti matrici po');
                    Writeln(' strokam 4erez probel ');
                    for i:=1 to n2 do
                    begin
                       Write('Stroka ',I,': ');
                       for j:=1 to m2 do
                       begin
                          a2[i,j]:=random(25);
                          write(a2[i,j]:2:1,' ');
                       END; {for}
                       writeln;
                    END; {for}
                 END; {s4et4ik slu4ajnyx 4isel}
               4:goto vyx;
            else
            BEGIN
               clrscr;
               textcolor(lightred);
               writeln('OWIBKA! Vyberite odin iz predlozhennyx punktov');
               textcolor(cyan);
               goto perexod01;
            END;{else}
            END; {metod vvoda vo vtoroj zada4e}
            {rewenie vtoroj zada4i}
            Writeln('Summa el-tov v levoy polovine');
            j:=1;
            While j<=(m2 div 2) do
            begin
               S2_:=0;
               I:=1;
               While i<=n2 do
               begin
                  S2_:=S2_+a2[i,j];
                  I:=i+1;
               end;
               Writeln('Summa ',j,'-go stolbca ravna: ', S2_:4:1);
               J:=J+1;
            end;
            Writeln('Summa el-tov v pravoy polovine');
            j:=((m2 div 2)+1);
            While j<=m2 do
            begin
               if (j mod 2)=0 then
               begin
                  S2_:=0;
                  I:=1;
                  While i<=n2 do
                  begin
                     S2_:=S2_+a2[i,j];
                     I:=i+1;
                  end;
                  Writeln('Summa ',j,'-go stolbca ravna: ', S2_:4:1);
               end;
               J:=J+1;
            end;
            writeln;
            writeln;
            END; {vtoraya zada4a}
      3: BEGIN  {tret'ya zada4a}
            writeln;
            writeln ('zada4a 3:');
            writeln;
            highvideo;
            writeln('Realizovat nabor podprogramm dlya vipolneniya sleduuwix');
            writeln('operaciy nad 4islami v westnadcatiri4noy sisteme s4isleniya:');
            writeln('a) slojenie,b)vi4itanie,c)umnojenie,d)delenie,e) perevod iz');
            writeln('dvoi4noy sistemi s4isleniya(s/s) v westnadcatiri4nuu,f)perevod');
            writeln('iz westnadcatiri4noy s/s v desyati4nuu,g)funkciya proverki');
            writeln('pravilnosti zapisi 4isla v westnadcatiri4noy s/s,h)funkcii,');
            writeln('realizuuwie operacii otnoweniya(ravno,ne ravno,bolwe ili ravno');
            writeln('menwe ili ravno,bolwe,menwe).');
            writeln('1)Vozvesti 4islo v stepen(osnovanie i pokazatel stepeni zapisani');
            writeln('v westnadcatiri4noy s/s).Otvet vidat v westnadcatiri4noy i');
            writeln('desyati4noy s/s');
            writeln('2)Dan massiv A-massiv 4isel,zapisannix v westnadcatiri4noy s/s');
            writeln('Otsortirovat ego v poryadke ubivaniya.Otvet vidat v westnadcatiri4noy');
            writeln('i desyati4noy s/s');
            normvideo;
            writeln;
            writeln('1. Slojenie');
            writeln('2. Vichitanie');
            writeln('3. Umnojenie');
            writeln('4. Delenie');
            writeln('5. Perevod iz 2 s/s v 16 s/s');
            writeln('6. Perevod iz 16 s/s v 10 s/s');
            writeln('7. Proverka pravilnosti zapisi 4isla v 16 s/s');
            writeln('8. Operacii otnoweniya');
            writeln('9. Vozvedenie 4isla v stepen');
            writeln('10. Sortirovka massiva');
            writeln('11. Vixod');
            writeln;
            highvideo;
            writeln('vyberite nomer i nazhmite enter');
            normvideo;
            writeln;
            readln(nom4);
            textcolor(lightblue);
            textbackground(black);
            CASE (nom4) of {vybor zadaniya  v tret'ey zada4e}
               1: begin
                     clrscr;
                     perexod02: begin
                     Writeln('Slojenie');
                     Writeln;
                     writeln('1. S klaviatury');
                     writeln('2. Iz fajla');
                     writeln('3. S4et4ik slu4ajnyx 4isel');
                     writeln('4. Vyxod.');
                     writeln;
                     highvideo;
                     writeln('vyberite nomer i nazhmite enter');
                     normvideo;
                     writeln;
                     readln(nom2);
                     textcolor(lightblue);
                     textbackground(black);
                     clrscr;
                     CASE (nom2) of {vybor metoda  v tret'ey zada4e}
                        1: begin
                           clrscr;
                           repeat
                              Write('Vvedite pervoe 16-ri4noe 4islo: ');
                              Readln(s1);
                              res3_7:=check_hex(s1);
                              if res3_7=false then
                              begin
                                 textcolor(lightred);
                                 Writeln('Owibka!Povtorite vvod 4isla');
                                 textcolor(lightblue);
                                 writeln;
                              end;
                           until res3_7;
                           repeat
                              Write('Vvedite vtoroe 16-ri4noe 4islo: ');
                              Readln(s2);
                              res3_7:=check_hex(s2);
                              if res3_7=false then
                              begin
                                 textcolor(lightred);
                                 Writeln('Owibka!Povtorite vvod 4isla');
                                 textcolor(lightblue);
                                 writeln;
                              end;
                           until res3_7;
                           end;
                        2: begin
                              clrscr;
                              write('vvedite imya fajla: ');
                              readln(name);
                              assign(fl,name);
                              {$I-}
                              reset(fl);
                              {$I+}
                              if ioresult=0 then
                              BEGIN
                                 repeat
                                    readln(fl,s1);
                                    writeln('Pervoe 16-ri4noe 4islo: ',s1);
                                    res3_7:=check_hex(s1);
                                    if res3_7=false then
                                    begin
                                       textcolor(lightred);
                                       Writeln('Owibka!Povtorite vvod 4isla');
                                       textcolor(lightblue);
                                       writeln;
                                    end;
                                 until res3_7=true;
                                 repeat
                                    readln(fl,s2);
                                    writeln('Vtoroe 16-ri4noe 4islo: ',s2);
                                    res3_7:=check_hex(s2);
                                    if res3_7=false then
                                    begin
                                       textcolor(lightred);
                                       Writeln('Owibka!Povtorite vvod 4isla');
                                       textcolor(lightblue);
                                       writeln;
                                    end;
                                 until res3_7=true;
                              close(fl);
                              end{if}
                              else
                              BEGIN
                                 writeln ('fajl ',name,' ne najden');
                                 goto vyx;
                              end;{iz fayla}
                              end;
                        4:goto vyx;
                        else
                        BEGIN
                           clrscr;
                           textcolor(lightred);
                           writeln('OWIBKA! Vyberite odin iz predlozhennyx punktov');
                           textcolor(cyan);
                           goto perexod02;
                        END;{else}
                        end;
                        {rewenie 3_1}
                        res3:=addHexToHex(s1,s2);
                        Writeln('Rezultat raven: ',res3);
                        writeln;
                        writeln;
                        end;
                        end;{perexod02}
               2: begin
                     clrscr;
                     perexod03: begin
                     Writeln('Vi4itanie');
                     Writeln;
                     writeln('1. S klaviatury');
                     writeln('2. Iz fajla');
                     writeln('3. S4et4ik slu4ajnyx 4isel');
                     writeln('4. Vyxod.');
                     writeln;
                     highvideo;
                     writeln('vyberite nomer i nazhmite enter');
                     normvideo;
                     writeln;
                     readln(nom2);
                     textcolor(lightblue);
                     textbackground(black);
                     CASE (nom2) of {vybor metoda  v tret'ey zada4e}
                        1: begin
                              clrscr;
                              repeat
                                 Write('Vvedite pervoe 16-ri4noe 4islo: ');
                                 Readln(s1);
                                 res3_7:=check_hex(s1);
                                 if res3_7=false then
                                 begin
                                    textcolor(lightred);
                                    Writeln('Owibka!Povtorite vvod 4isla');
                                    textcolor(lightblue);
                                    writeln;
                                 end;
                              until res3_7;
                              repeat
                                 Write('Vvedite vtoroe 16-ri4noe 4islo: ');
                                 Readln(s2);
                                 res3_7:=check_hex(s2);
                                 if res3_7=false then
                                 begin
                                    textcolor(lightred);
                                    Writeln('Owibka!Povtorite vvod 4isla');
                                    textcolor(lightblue);
                                    writeln;
                                 end;
                              until res3_7;
                           end;
                        2: begin
                              clrscr;
                              write('vvedite imya fajla: ');
                              readln(name);
                              assign(fl,name);
                              {$I-}
                              reset(fl);
                              {$I+}
                              if ioresult=0 then
                              BEGIN
                                 repeat
                                    readln(fl,s1);
                                    writeln('Pervoe 16-ri4noe 4islo: ',s1);
                                    res3_7:=check_hex(s1);
                                    if res3_7=false then
                                    begin
                                       textcolor(lightred);
                                       Writeln('Owibka!Povtorite vvod 4isla');
                                       textcolor(lightblue);
                                       writeln;
                                    end;
                                 until res3_7=true;
                                 repeat
                                    readln(fl,s2);
                                    writeln('Vtoroe 16-ri4noe 4islo: ',s2);
                                    res3_7:=check_hex(s2);
                                    if res3_7=false then
                                    begin
                                       textcolor(lightred);
                                       Writeln('Owibka!Povtorite vvod 4isla');
                                       textcolor(lightblue);
                                       writeln;
                                    end;
                                 until res3_7=true;
                              close(fl);
                              end{if}
                              else
                              BEGIN
                                 writeln ('fajl ',name,' ne najden');
                                 goto vyx;
                              end;{iz fayla}
                              end;
                        4:goto vyx;
                        else
                        BEGIN
                           clrscr;
                           textcolor(lightred);
                           writeln('OWIBKA! Vyberite odin iz predlozhennyx punktov');
                           textcolor(cyan);
                           goto perexod03;
                        END;{else}
                        end;
                        {rewenie 3_2}
                        res3:= vich(s1,s2);
                        Writeln('Rezultat raven: ',res3);
                        writeln;
                        writeln;
                        end;{perexod03}
                  end;
               3: begin
                     clrscr;
                     perexod04: begin
                     Writeln('Umnojenie');
                     Writeln;
                     writeln('1. S klaviatury');
                     writeln('2. Iz fajla');
                     writeln('3. S4et4ik slu4ajnyx 4isel');
                     writeln('4. Vyxod.');
                     writeln;
                     highvideo;
                     writeln('vyberite nomer i nazhmite enter');
                     normvideo;
                     writeln;
                     readln(nom2);
                     textcolor(lightblue);
                     textbackground(black);
                     CASE (nom2) of {vybor metoda  v tret'ey zada4e}
                        1: begin
                              clrscr;
                              repeat
                                 Write('Vvedite pervoe 16-ri4noe 4islo: ');
                                 Readln(s1);
                                 res3_7:=check_hex(s1);
                                 if res3_7=false then
                                 begin
                                    textcolor(lightred);
                                    Writeln('Owibka!Povtorite vvod 4isla');
                                    textcolor(lightblue);
                                    writeln;
                                 end;
                              until res3_7;
                              repeat
                                 Write('Vvedite vtoroe 16-ri4noe 4islo: ');
                                 Readln(s2);
                                 res3_7:=check_hex(s2);
                                 if res3_7=false then
                                 begin
                                    textcolor(lightred);
                                    Writeln('Owibka!Povtorite vvod 4isla');
                                    textcolor(lightblue);
                                    writeln;
                                 end;
                              until res3_7;
                           end;
                        2: begin
                              clrscr;
                              write('vvedite imya fajla: ');
                              readln(name);
                              assign(fl,name);
                              {$I-}
                              reset(fl);
                              {$I+}
                              if ioresult=0 then
                              BEGIN
                                 repeat
                                    readln(fl,s1);
                                    writeln('Pervoe 16-ri4noe 4islo: ',s1);
                                    res3_7:=check_hex(s1);
                                    if res3_7=false then
                                    begin