Compilare: main.cpp:24:27: warning: multi-character character constant [-Wmultichar] 24 | cout << "! " << rez <<' \n'; | ^~~~~ main.cpp: In function 'int main()': main.cpp:24:21: warning: 'rez' may be used uninitialized in this function [-Wmaybe-uninitialized] 24 | cout << "! " << rez <<' \n'; | ^~~