Compilare: main.cpp: In function 'int main()': main.cpp:359:18: warning: 'u' may be used uninitialized in this function [-Wmaybe-uninitialized] while (q <= b) ~~^~~~ main.cpp:315:13: note: 'u' was declared here int u; ^ main.cpp:411:44: warning: 'u' may be used uninitialized in this function [-Wmaybe-uninitialized] g << arb -> mai_mare(x) << "\n"; ^~~~ main.cpp:405:43: warning: 'u' may be used uninitialized in this function [-Wmaybe-uninitialized] g << arb -> mai_mic(x) << "\n"; ^~~~