Compilare: user.cpp: In constructor ‘Frequency::Frequency(int, int)’: user.cpp:14:9: warning: ‘Frequency::number’ will be initialized after [-Wreorder] int number; ^~~~~~ user.cpp:13:9: warning: ‘int Frequency::frequency’ [-Wreorder] int frequency; ^~~~~~~~~ user.cpp:15:5: warning: when initialized here [-Wreorder] Frequency(int n, int f): ^~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:71:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("elmaj.in", "r", stdin); ^ user.cpp:72:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("elmaj.out", "w", stdout); ^ user.cpp:75:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:79:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^