Compilare: user.cpp: In function ‘int main()’: user.cpp:144:9: warning: unused variable ‘j’ [-Wunused-variable] int i, j, n, t, si = 0, sf = 0, ds = 0; ^ user.cpp:144:15: warning: unused variable ‘t’ [-Wunused-variable] int i, j, n, t, si = 0, sf = 0, ds = 0; ^ user.cpp:144:34: warning: unused variable ‘ds’ [-Wunused-variable] int i, j, n, t, si = 0, sf = 0, ds = 0; ^