Compilare: user.cpp: In function ‘int main()’: user.cpp:72:9: warning: unused variable ‘t’ [-Wunused-variable] int t, i, st, dr, total = 0, last; ^ user.cpp:72:15: warning: unused variable ‘st’ [-Wunused-variable] int t, i, st, dr, total = 0, last; ^ user.cpp:72:19: warning: unused variable ‘dr’ [-Wunused-variable] int t, i, st, dr, total = 0, last; ^