Compilare: user.cpp: In function ‘void erostane(bool*, long unsigned int)’: user.cpp:7:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2;i<=n;++i) ^ user.cpp:13:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=i;j<=n/i;++j) ^ user.cpp: In function ‘int main()’: user.cpp:30:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long i=2;i<n;i++) ^ user.cpp:35:20: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Wformat=] printf("%d", sum); ^