{
for (int k = 0; k
if (s1 [k] <'0 '| | s1 [k]> '9') {s1.Delete (k, 1); k -;}
if (s1.IsEmpty ()) s1 = '0 ';
}
else s1 = '0 ';
t_edit [i] [j]. SetWindowText (s1);