Compilare: user.cpp: In function ‘int main()’: user.cpp:12:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, x=0, a, b, d, e, p=1, s=0; ^ user.cpp:12:15: warning: unused variable ‘x’ [-Wunused-variable] int i, j, x=0, a, b, d, e, p=1, s=0; ^