Compilare: user.cpp: In function ‘int main()’: user.cpp:10:15: warning: unused variable ‘i’ [-Wunused-variable] int a, b, i, j, k, _b, lp, nd = 0; ^ user.cpp:10:18: warning: unused variable ‘j’ [-Wunused-variable] int a, b, i, j, k, _b, lp, nd = 0; ^ user.cpp:10:24: warning: variable ‘_b’ set but not used [-Wunused-but-set-variable] int a, b, i, j, k, _b, lp, nd = 0; ^ user.cpp:10:28: warning: unused variable ‘lp’ [-Wunused-variable] int a, b, i, j, k, _b, lp, nd = 0; ^ user.cpp:10:32: warning: unused variable ‘nd’ [-Wunused-variable] int a, b, i, j, k, _b, lp, nd = 0; ^