MLingkaran.java F:\SchoolSums-Praktikum\Semester4\PemrogramanBerbasisObjek\14.03.17\2\MLingkaran.java:11:错误:找不到符号灵卡兰l=新灵卡兰();^符号:类灵卡兰位置:类F:\SchoolSums-Praktikum\Semester4\PemrogramanBerbasisObjek\14.03.17\2\MLingkaran.javakeliling;
public lingk
我按照以下方式创建了student表: last_name char(20) , Major char(10) , ISGraduate BOOLEAN,其中,isgraduate布尔变量衡量学生是否是研究生我还有一个实体是professor,如下所示:
create table professor (net_id cha