Compilare: user.cpp: In function ‘void ssnd(long long int)’: user.cpp:77:59: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;factori[i]*factori[i]<=nr&&i<factori.size();i++){ ^ user.cpp: In function ‘char read_ch()’: user.cpp:20:33: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(in_buff,1,4096,fin); ^