Eroare de compilare: user.cpp: In function ‘void citire()’: user.cpp:87: error: ‘in’ was not declared in this scope user.cpp: In constructor ‘Reader::Reader(const int&)’: user.cpp:171: error: ‘assert’ was not declared in this scope user.cpp: In member function ‘void Reader::next()’: user.cpp:205: error: ‘assert’ was not declared in this scope user.cpp: In function ‘int main()’: user.cpp:217: warning: unused variable ‘i’ user.cpp:217: warning: unused variable ‘a’ user.cpp:217: warning: unused variable ‘b’