Compilare: user.cpp: In function ‘int main()’: user.cpp:15:5: warning: ‘n’ is used uninitialized in this function [-Wuninitialized] for(int i = 1; i <= n; ++i) ^ user.cpp:28:5: warning: ‘m’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(int i = 1; i <= m; ++i) ^