Man jis turejo atrodyti taip:
program darbelis;
var a:string;
rf:text;
begin
Assign(Rf,'rez.txt'); Rewrite(Rf);
WriteLn('Iveskite skaiciu: ');
ReadLn(a);
WriteLn('Rezultatas: ',a,' Skaitmenu skaicius: ',length(a));
ReadLn;
WriteLn(Rf,'Rezultatas=',a);
WriteLn(rf,'skaitmenu skaicius:',length (a));
Close(rf);
end.
Nes uzduotyja parasyta paciam gale "bei i rez.txt faila"