TStringList* sl = new TStringList;
sl->Delimiter = ' ';
for(int line = 0; line < Memo1->Lines-Count; line++)
{
sl->DelimitedText = Memo1->Lines->Strings[line];
for(int nmb = 0; nmb < sl->Count; nmb++)
a[line][nmb] = sl->Strings[nmb].ToDouble(); // или ToInt();
}