Program _4_1; {Vichislaem obiem cilindra}
uses crt;
var
r,h:word;
function Obiem(radius,high:word):extended;
begin
Obiem:=2*Pi*radius*high;
end;
begin
clrscr;
writeln('Vedite radius cilindra.');
readln(r);
writeln('Vvedite visotu cilindra ');
readln(h);
writeln('Obiem raven ',obiem(r,h):4:2);
readln;
end.