程序代码：

    CFile f;
    f.Open("1.txt",CFile::modeCreate|CFile::modeWrite);
    f.SeekToEnd();
    CArchive ar(&f,CArchive::store);
    

    ar<<s_strs;
    ar.Close();
    f.Close();

f.Open("1.txt",CFile::modeCreate|CFile::modeWrite);

程序代码：

CFile f;
    if(!f.Open("1.txt",CFile::modeWrite)){
        f.Open("1.txt",CFile::modeCreate|CFile::modeWrite);
        MessageBox("文件不存在，将创建！");}

    f.SeekToEnd();
    CArchive ar(&f,CArchive::store);