[cs631apue] -1 (one) option

[xxu15 at stevens.edu]

Hi,
According to the midterm ls requirment, the output is always one entry per line, no matter there is or not a -1 (one) option.
Is there any typo in the requirement document?




Sincerely,
Xiang Xu (徐祥) 
Student ID: 10388813
tel: +1 (201) 918-0570
      +86 13851478402
qq: 185904095
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