program Project1;
var
sum,eps:real;
function SummSequence(n:real;eps:real):real;
var
p,summ:real;
begin
summ := 0.0;
p := 1;
while (p >= eps) do
begin
p:= 1/(n*(n + 1));
summ := summ + p;
n:= n +1;
end;
SummSequence := summ;
end;
begin
writeln('Vvedite zadannuiu tocinosti');
write('eps=');readln(eps);
sum := SummSequence(1,eps);
writeln('Summa =',sum:10:8);
readln;
end.