tai sao lai dung lenh writeln trong doan chuong trinh sau va neu khong co thi co sao hon?
code:
for i:=1 to 10 do begin
for j:=1 to 3 do
write (a[i],'');
writeln;
end;
...
ta bo writeln thi don gian hon chu?tai sao lai dung vay?
bo writeln chay binh thuong ma.
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