文件结束符 EOF ; end of file ; end-of-file ; CTRL-D
文件结束指示符 end of file indicator
数据文件结束语句 end of file statement
文件结束标志 [计] end-of-file mark ; End Of Line ; end of file mark ; EOF
文件结束间隙 [计] end-of-file gap
文件结束语句 ENDFILE
文件结束指示标记 end-of-file indicator
命令文件结束 command document end ; CDE CommandDocumentEnd ; [计] end of command file
当所有数据全部写入之后，就需要设置eof(文件结束参数)。
When all the data have been written, set the eof (end-of-file) argument.
ignoree of：忽略文件结束字符，并且不退出shell。
Ignoreeof: ignore end-of-file characters, and do not exit the shell.
可是，也有一些忧虑是出自一些使用数字9999标记文件结束的数字系统。
But there were also worries because some data systems used the digits 9999 to mark the end of a file.
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