Compilare: user.cpp: In function ‘void BF(int, int)’: user.cpp:12:9: warning: unused variable ‘prim’ [-Wunused-variable] int prim, ultim, i, j, k, vfx, vfy, x, y; ^ user.cpp:12:15: warning: unused variable ‘ultim’ [-Wunused-variable] int prim, ultim, i, j, k, vfx, vfy, x, y; ^ user.cpp:12:22: warning: unused variable ‘i’ [-Wunused-variable] int prim, ultim, i, j, k, vfx, vfy, x, y; ^ user.cpp:12:25: warning: unused variable ‘j’ [-Wunused-variable] int prim, ultim, i, j, k, vfx, vfy, x, y; ^ user.cpp: In function ‘int main()’: user.cpp:41:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, x, y; ^