Compilare: user.cpp: In function ‘void BF(int, int)’: user.cpp:11:22: warning: unused variable ‘i’ [-Wunused-variable] int prim, ultim, i, j, k, vfx, vfy, x, y; ^ user.cpp:11:25: warning: unused variable ‘j’ [-Wunused-variable] int prim, ultim, i, j, k, vfx, vfy, x, y; ^ user.cpp: In function ‘int main()’: user.cpp:40:17: warning: variable ‘fout’ set but not used [-Wunused-but-set-variable] FILE *fin, *fout; ^ user.cpp:46:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, x, y; ^