Compilare: user.cpp: In function ‘int main()’: user.cpp:54:24: warning: ‘nr2’ may be used uninitialized in this function [-Wmaybe-uninitialized] else fout<<nr2<<' '<<nr1<<'\n'; ^ user.cpp:54:34: warning: ‘nr1’ may be used uninitialized in this function [-Wmaybe-uninitialized] else fout<<nr2<<' '<<nr1<<'\n'; ^