program DemoCalc;
var
X, Y, Rezult : real;
Ope, Ans : char;
begin
repeat
      write('X = ');
      Readln(X);
      write('Y = ');
      Readln(Y);
      Writeln('операция (+,-,/,*) >');
      Readln(Ope);
      case Ope of
      '+' : Rezult := X+Y;
      '-' : Rezult := X-Y;
      '*' : Rezult := X*Y;
      '/' : Rezult := X/Y;
      else
      writeln('Error nah...');
end;
Writeln(X, Ope, Y, '=' , Rezult);
Writeln('Продолжить Y\N');
Readln(Ans);
Until (Ans='N') or (Ans='n');
end.