Compilare: user.cpp: In function ‘int main()’: user.cpp:102:17: warning: unused variable ‘rc’ [-Wunused-variable] int rc = Ancestor(i, v[i]); ^ user.cpp: In function ‘void get_number(int&)’: user.cpp:30:40: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, Size, stdin); ^ user.cpp:41:40: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, Size, stdin); ^ user.cpp: In function ‘int Ancestor(int, int)’: user.cpp:66:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:70:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cerere.in", "r", stdin); ^ user.cpp:71:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cerere.out", "w", stdout); ^