MFC文件读写

示例代码：

 CFile file;
 file.Open("E:\\1.txt",CFile::modeCreate|CFile::modeRead|CFile::modeWrite);
 char buf[]="wangkechuang";
 file.Write(buf,sizeof(buf));
 file.Close();

 file.Open("E:\\1.txt",CFile::modeRead);
 char buf1[]="";
 file.Read(buf1,sizeof(buf));
 file.Close();
 MessageBox(buf1);