Compilare: user.cpp: In function ‘int main()’: user.cpp:36:33: warning: ‘nr3’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<nr1<<endl<<nr2<<endl<<nr3; ^ user.cpp:36:19: warning: ‘nr2’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<nr1<<endl<<nr2<<endl<<nr3; ^ user.cpp:36:8: warning: ‘nr1’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<nr1<<endl<<nr2<<endl<<nr3; ^