sửa lại:
program tim_bcnn;
uses crt;
var x, y, i, n, ucln, bcnn: longint;
a: array[1..100] of integer;
function h_ucln(x,y:integer):integer;
begin
while x<>y do
if x>y then
x:=x-y
else
y:=y-x;
h_ucln:=x;
end;
begin
clrscr;
repeat
write('Nhap N (N>=2): ');
readln(n);
until(n>=2);
for i:=1 to n do
begin
write('Phan tu thu ',i,' = ');
readln(a[i]);
end;
ucln:=h_ucln(a[1],a[2]);
bcnn:=(a[1]*a[2]) div ucln;
for i:=3 to n do
begin
ucln:=h_ucln(bcnn,a[i]);
bcnn:=(bcnn*a[i]) div ucln;
end;
writeln('bcnn la: ',bcnn);
readln;
end.
được rồi ạ, nhớ cho mình 5 sao nhé :)
