用定点补码表示纯小数，采用8位字长，编码10000000表示的十进制数是_。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='30252' and id < 2447288 and id<>'2447288' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30252' and id > 2447288 and id<>'2447288' order by id asc limit 5