Main.cpp

Why error occurs when was trying to enter the id of student here is my code

Student.h

Exinclude "Books. h" #include,Books. h" #include"person. h" #include*Student. h" #include(string) #include using namespace std 9 int main 10 12 13 14 15 16 17 Date birthday (4, 12, 1999); Person aa ("aa", 123456, birthday) Student PP (122, aa, birthday); Date borrow (12, 18, 2017) Books book ( "A book", PP, borrow) Date current (1, 1, 2018): return 0