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语句ofstream f("DATA.DAT",ios_base::app|ios_base::binary);的功能是建立流对象f,并试图打开文件DATA.DAT并与之连接,而且

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outfilfail()或outfile  outfilgood()或!outfile  outfilgood()或outfile  outfilfail()或!outfile  
outfilfail()或outfile  outfilgood()或!outfile  outfilgood()或outfile  outfilfail()或!outfile  
ofstream myfile:myfile, open("d:ofiltxt");  ofstream *myfile=new ofstream;myfile->open("d;ofiltxt");  ofstream myfile("d:ofiltxt");  ofstream *myfile=new ("d:ofiltxt");  
outfilfail()或 outfile  outfilgood()或 !outfile  outfilgood()或 outfile  outfilfail()或 !outfile  
ofstream myfile;mynle.open(“d:ofile.txt”);  ofstream * mynle=new ofstream;mynle->open(“d:Ofile.txt”);  ofstream myhle(“d:ofile.txt”);  ofstream * mynle=new(“d:ofile.txt”);  
outfilfail() 或 outfile  outfilgood()或!outfile  outfilgood()或 outfile  outfilfail()或!outfile  
outfilfail()或outfile  outfilgood()或!outfile  outfilgood()或outfile  outfilfail()或!outfile  
ofstream myfile;myfile.open("d:ofile.txt");  ofstream*myfile=new ofstream;myfile->open("d:ofile.txt");  ofstream myfile("d:ofile.txt");  ofstream*myfile=new("d:ofile.txt");  
ofstream cfile; cfilopen( "d : ofiltxt" );  ofstream * cfile = new ofstream; cfile -> open( "d : ofiltxt );  ofstream cfile( "d: ofiltxt" );  ofstream * cfile = new( "d : ofiltxt" )  
ofstream myfile;mynlopen(“d:ofiltxt”);  ofstream * mynle=new ofstream;mynle->open(“d:Ofiltxt”);  ofstream myhle(“d:ofiltxt”);  ofstream * mynle=new(“d:ofiltxt”);  
ofstream myfile;myfilopen("d:ofiltxt");  ofstream*myfile=new ofstream;myfile->open("d:ofiltxt");  ofstream myfile("d:ofiltxt");  ofstream*myfile=new("d:ofiltxt");  
outfilfail ()或outfile  outfil good() 或outfile  outfilgood ()或!outfile  outfilfail()或!outfile  
ofstream cfile; cfile.open( "d : ofile.txt" );  ofstream * cfile = new ofstream; cfile -> open( "d : ofile.txt );  ofstream cfile( "d: ofile.txt" );  ofstream * cfile = new( "d : ofile.txt" )  
outfilfail()或outfile  outfilgood()或!outfile  outfilgood()或outfile  outfilfail()或!outfile  
ofstream myfile:myfile, open("d:ofile.txt");  ofstream *myfile=new ofstream;myfile->open("d;ofile.txt");  ofstream myfile("d:ofile.txt");  ofstream *myfile=new ("d:ofile.txt");  
ofstream myfile;myfile.open("d:ofile.txt");  ofstream *myfile=new ofstream;myfile->open("d:ofile.txt");  ofstream myfile("d:ofile.txt");  ofstream *myfile=new("d:ofile.txt");  
outfile.fail() 或 outfile  outfile.good()或!outfile  outfile.good()或 outfile  outfile.fail()或!outfile  
outfilfail( )或outfile  outfilgood( )或outfile  outfilgood( )或!outfile  outfilfail( )或!out file  
outfilfail()或outffle  outfilgood()或!outfile  outfilgood()或outfile  outfilfail()或!outfile  
ofstreammyfile;myfile.open("d:ofile.txt");  ofstream*myfile=newofstream;myfile->open("d:ofile.txt”);  ofstreammyfile("d:ofile.txt");  ofstream*myfile=new("d:ofile.txt");  

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