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以下不能作为输出流对象的是

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ofstream myfile:myfile, open("d:ofiltxt");  ofstream *myfile=new ofstream;myfile->open("d;ofiltxt");  ofstream myfile("d:ofiltxt");  ofstream *myfile=new ("d:ofiltxt");  
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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”);  
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");  
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" )  
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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");  

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