Compilare: user.cpp: In function ‘int BF(int)’: user.cpp:11:25: warning: unused variable ‘j’ [-Wunused-variable] int prim, ultim, i, j, k, vf, x, y, q[22000]; ^ user.cpp:11:28: warning: unused variable ‘k’ [-Wunused-variable] int prim, ultim, i, j, k, vf, x, y, q[22000]; ^ user.cpp:11:38: warning: unused variable ‘y’ [-Wunused-variable] int prim, ultim, i, j, k, vf, x, y, q[22000]; ^