Зачем нам вещественный массив?
var
i, j, n: integer;
tmp: double;
mas: array[1..101] of double;
begin
randomize;
readln(n);
for i:=1 to n do
begin
mas[i]:= random(-100,107);
end;
for i:=1 to n do
for j:=1 to n do
if mas[j]>mas[j+1] then
begin
tmp:=mas[j];
mas[j]:=mas[j+1];
mas[j+1]:=tmp;
end;
for i:=1 to n do
write(mas[i], ' ');
end.