Procedure swap(var a, b: real);
var t: real;
begin
t := a;
a := b;
b := t;
end;
var a, b, c: real;
begin
readln(a, b, c);
if (a > b) then swap(a, b);
if (b > c) then swap(b, c);
if (a > b) then swap(a, b);
writeln(a, ' ', b, ' ', c);
end.
===========================
Без процедур:
var a, b, c, t: integer;
begin
readln(a, b, c);
if (a > b) then
begin
t := a;
a := b;
b := t;
end;
if (b > c) then
begin
t := b;
b := c;
c := t;
end;
if (a > b) then
begin
t := a;
a := b;
b := t;
end;
writeln(a, ' ', b, ' ', c);
end.