C++作业，输入学生编号，性别，生日，身份证号，用到了拷贝构造函数，访问友元变量，调用输入函数输入成员信息，最后显示输入的信息-C + + jobs, enter the student number, sex, date of birth, ID number, use the copy constructor, to visit friends variable input membership information call the input function, and finally