voidmai
ApaBb7pab答案：Bi
tmi
t
0Amj
因为基类是抽象类，不能被实例化，所以在派生类中不能调用初始化基类对象。所以Bi
tmi
t
0Amj
错误，删去Am。［修改］Bi
tmi
t
0j
4i
cludeiostreamhclassXpublici
txpublicXi
txcoutthisxxe
dl
fXXtxtxcouttxe
dlvoidfu
Xvoidfu
Xtcouttxe
dlvoidmai
fu
X10答案：coutthisxxe
dl要输出thisxx表达式的值要加括号。［修改］cout（thisxx）e
dl5i
cludeiostreamhi
cludestri
ghclassBaspublicBaschars