内容转载自 https://blog.csdn.net/my_angle2016/article/details/107957105

#define KB 1024
#define MB (1024*KB)
#define GB (1024*MB)

void CDemoDlg::OnTest()
{
    int nNum1 = GetDlgItemInt(IDC_NUM1);
    CString strNum2 = _T("");

    //转换成GB
    if (nNum1 > GB)
    {
        strNum2.Format(_T("%0.2fGB"), (double)nNum1 / GB);
    }
    //转换成MB
    else if (nNum1 > MB)
    {
        strNum2.Format(_T("%0.2fMB"), (double)nNum1 / MB);
    }
    //转换成KB
    else if (nNum1 > KB)
    {
        int n = nNum1 / KB;
        strNum2.Format(_T("%0.2fKB"), (double)nNum1 / KB);
    }
    else
    {
        strNum2.Format(_T("%dByte"), nNum1);
    }

    SetDlgItemText(IDC_NUM2, strNum2);
}

获得文件大小用 CFile::GetStatus

    //获得文件大小
    CFileStatus status;
    CFile::GetStatus(file_path, status);

    int nNum1 = 0;
    CString strNum2;
    nNum1 = nNum1 + status.m_size;

 

阿飞

2021年10月24日