Compilare: user.cpp: In member function ‘void Big::print()’: user.cpp:134:33: warning: '#' flag used with ‘%d’ gnu_printf format [-Wformat=] printf("%#04d", v[i]); ^ user.cpp: In function ‘int main()’: user.cpp:248:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("eval.in", "r", stdin); ^ user.cpp:249:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("eval.out", "w", stdout); ^ user.cpp:251:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:254:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", ostr); ^ user.cpp: In member function ‘void Big::scan()’: user.cpp:141:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", str); ^