@[em_eemm_eeemmm_](/user/964645)
`while(~scanf("%d",&a[++len]));`
scanf 读不到数据返回 -1
-1 = true
by Never_Knows_Best @ 2023-11-09 17:42:07
@[Never_Knows_Best](/user/685602) 读得到呢
by pies_0x @ 2023-11-09 17:44:00
@[em_eemm_eeemmm_](/user/964645) 不知道，反正是 true
by Never_Knows_Best @ 2023-11-09 17:54:12