Compilare: user.cpp: In function ‘int main()’: user.cpp:25:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i!=0 && i<=X) ^ user.cpp:31:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i>X) ^ user.cpp:18:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("expozitie.in","r",stdin); ^ user.cpp:19:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("expozitie.out","w",stdout); ^