C++程序设计教程：14_3

//14_3
//运行结果为：
create a X object with 1
create a X object with 2 //创建临时对象
call a func with para X object
create a X object from other X object
erase a object //析构临时对象
create a X object from other X object
call a func with para X object
create a X object from other X object
erase a object
erase a object
erase a object
erase a object