Compilare: user.cpp: In member function ‘void aint::expand()’: user.cpp:65:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (aux.size() - 1 < rez) aux.pb(0); ~~~~~~~~~~~~~~~^~~~~ user.cpp: In function ‘bool check(double)’: user.cpp:143:9: warning: unused variable ‘i’ [-Wunused-variable] int i; ^ user.cpp: In function ‘int main()’: user.cpp:155:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("craciun.in","r",stdin); ^ user.cpp:156:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("craciun.out","w",stdout); ^ user.cpp:158:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:159:52: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (i = 1; i <= n; i++) scanf("%lf", &here[i]); ^ user.cpp:161:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^