Compilare: user.cpp: In function ‘bool readObj(int)’: user.cpp:70:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < values.size(); i++) ^ user.cpp: In function ‘bool readPair(int)’: user.cpp:59:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘bool readObj(int)’: user.cpp:75:1: warning: control reaches end of non-void function [-Wreturn-type] } ^