Compilare: main.cpp: In function 'int main()': main.cpp:49:14: warning: 'chrez' may be used uninitialized in this function [-Wmaybe-uninitialized] char chrez; ^~~~~ main.cpp:72:14: warning: 'col' may be used uninitialized in this function [-Wmaybe-uninitialized] << chrez; ^~~~~ main.cpp:71:21: warning: 'lin' may be used uninitialized in this function [-Wmaybe-uninitialized] g << lin << " " << col << '\n' ^~~