A.p–>bir–>y B.p–>bir.y C.stu.bir.y D.stu.name
A.structstudentstu[2]={1,"zhangsan",2,"lisi"}; B.structstudentstu[2]={{1,"zhangsan"},{2,"lisi"}}; C.structstu[2]={{1,"zhangsan"},{2,"lisi"}}; D.structstudentstu[]={{1,"zhangsan"},{2,"lisi"}};
A.結構類型名為student B.結構類型名為stu C.num是結構成員名 D.struct是C的關鍵字