Compilare: user.cpp: In function ‘int main()’: user.cpp:89:45: warning: ‘ny’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<(k*(k+1)*(2*k+1)/6)+(nx-1)*(k+1)+ny<<" "; ^ user.cpp:89:35: warning: ‘nx’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<(k*(k+1)*(2*k+1)/6)+(nx-1)*(k+1)+ny<<" "; ^