Compilare: user.cpp: In function ‘int main()’: user.cpp:60:19: warning: statement has no effect [-Wunused-value] m[b.l][b.c]; ^ user.cpp:83:15: warning: ‘lg’ may be used uninitialized in this function [-Wmaybe-uninitialized] g << -lg +1 <<"\n"; ^ user.cpp:52:12: warning: ‘c’ may be used uninitialized in this function [-Wmaybe-uninitialized] p.c = c; ^ user.cpp:51:12: warning: ‘l’ may be used uninitialized in this function [-Wmaybe-uninitialized] p.l = l; ^