Compilare: user.cpp: In function ‘int update(int, int)’: user.cpp:22:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int norm1(ob*)’: user.cpp:70:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int norm2(ob*)’: user.cpp:87:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int push(int, int)’: user.cpp:90:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int clean()’: user.cpp:96:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^