语句ofstreamfDAT-X题卡

以读方式打开成功以读方式打开失败，但以写方式打开成功以读方式打开失败，以写方式打开也失败以读方式打开成功，以写方式打开也成功

outfilfail()或outfile outfilgood()或!outfile outfilgood()或outfile outfilfail()或!outfile

outfilfail()或outfile outfilgood()或!outfile outfilgood()或outfile outfilfail()或!outfile

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 !outfile

outfile.fail()或outfile outfile.good()或!outfile outfile.good()或outfile outfile.fail()或!outfile

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!outfile

outfilfail()或outfile outfilgood()或!outfile outfilgood()或outfile outfilfail()或!outfile

outfile.fail( )或outfile outfile.good( )或outfile outfile.good( )或!outfile outfile.fail( )或!out file

outfile.fail()或outfile outfile.good()或!outfile outfile.good()或outfile outfile.fail()或!outfile

outfilfail ()或outfile outfil good() 或outfile outfilgood ()或!outfile outfilfail()或!outfile

outfile．fail()或outfile outfile．good()或!outfile outfile．good()或outfile outfile．fail()或!outfile

outfile.fail()或outffle outfile.good()或!outfile outfile.good()或outfile outfile.fail()或!outfile

关系模型层次模型网状模型以上皆非

outfilfail()或outfile outfilgood()或!outfile outfilgood()或outfile outfilfail()或!outfile

outfile.fail()或outfile outfile.good()或!outfile outfile.good()或outfile outfile.fail()或!outfile

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

语句ofstream f(“DAT