Compilare: user.cpp: In function ‘int main()’: user.cpp:8:12: warning: unused variable ‘n’ [-Wunused-variable] double h, n, m, a; ^ user.cpp:9:9: warning: unused variable ‘i’ [-Wunused-variable] int t, i; ^ user.cpp:10:12: warning: unused variable ‘hi’ [-Wunused-variable] long long hi, mi, ans; ^ user.cpp:10:16: warning: unused variable ‘mi’ [-Wunused-variable] long long hi, mi, ans; ^ user.cpp:10:20: warning: unused variable ‘ans’ [-Wunused-variable] long long hi, mi, ans; ^ user.cpp:6:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tictac.in", "r", stdin); ^ user.cpp:7:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tictac.out", "w", stdout); ^ user.cpp:11:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ user.cpp:14:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf %lf", &h, &m); ^