void CXDlg::Ondelete(){// TODO: Add your control notification handler code hereint i=m_num.GetLength();if(i != 0){m_num.Delete(i-1,1);UpdateData(false);}}出現下面兩個錯誤：error C2228:left of '.GetLength' must have class/struct/union typeerror C2228: left of '.Delete' must have class/struct/union type應該怎么改？
出現下面兩個error：我應該怎么修改？
慕碼人8056858
2022-05-12 14:11:41
