Compilare: user.cpp: In function ‘int main()’: user.cpp:14:11: warning: unused variable ‘a’ [-Wunused-variable] int i,a; ^ user.cpp:34:18: warning: ‘p2’ may be used uninitialized in this function [-Wmaybe-uninitialized] t2<<p1<<' '<<p2<<'\n'; ^ user.cpp:34:9: warning: ‘p1’ may be used uninitialized in this function [-Wmaybe-uninitialized] t2<<p1<<' '<<p2<<'\n'; ^