Compilare: user.cpp: In function ‘int f(int&)’: user.cpp:26:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int p(int&)’: user.cpp:42:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int s(int&)’: user.cpp:63:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int d(int&)’: user.cpp:75:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^