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Question

void CFileTestDlg::Insert() //Button1
{
 CFile *file=new CFile();
 char m_buffer[7]={"abcdef"};
 CString filename="d:\\35.doc";
 file->Open(filename,CFile::modeReadWrite,NULL);
 file->SeekToEnd();
 file->Write(m_buffer,strlen(m_buffer));
 file->Close();
}void CFileTestDlg::Show() //Button2
{
char pbBuffer[7];
CFile *file=new CFile();
         CString filename="d:\\35.doc";
file->Open(filename,CFile::modeReadWrite,NULL);
file->Seek(-6,CFile::end);
         file->Read(pbBuffer,7);
     SetDlgItemText(IDC_TEXTBOX1,pbBuffer);//把得到的字符在textbox1显示
         file->Close();
}
可是显示如下: abcdef烫t?请赐教

Answer 1

字符串没有结束符\0P.S.其实读6个就够了
file->Read(pbBuffer,6);

Answer 2

文件中只有6个字符,你只能读到6个
file->Read(pbBuffer,6);
pbBuffer[6]=0;

Answer 3

vcmute(横秋) 说得够清楚了,字符串没有结束符\0
读完要加
pbBuffer[6]=0;