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char *pFileName="test.txt";CStdioFile sf;if（！sf.Open（pFileName,CFile::modeCreate|CFile::modeReadWrite|CFile::typeText））{#ifdef _DEBUGafxDump<<"Unable to open file"<<"
";#endifexit（1）;}char aaa[]="aaa
";//"
" :0x0A char *bbb="bbb12";//"12":0x0ACString ccc（"ccc15"）;//"15":0x0Dsf.WriteString（aaa）;sf.WriteString（bbb）;sf.WriteString（ccc）;sf.WriteString（"ddd
"）;//"
" :0x0Dsf.Close（）;CStdioFile sf2（"test.txt",CFile::modeRead|CFile::typeText）;char buf[8];CString str;LPTSTR lpstr=sf2.ReadString（buf,8）;AfxMessageBox（buf）;while（sf2.ReadString（str））AfxMessageBox（str）;sf2.Close（）;