Compilare: user.cpp: In constructor ‘HugeN::HugeN(long long int)’: user.cpp:23:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] x[++x[0]]=nr%10; ^ user.cpp: In member function ‘HugeN HugeN::operator+=(const HugeN&)’: user.cpp:69:20: warning: unused variable ‘i’ [-Wunused-variable] int tr=0, aux, i; ^ user.cpp: In function ‘int main()’: user.cpp:91:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("next.in","r",stdin); ^ user.cpp:96:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld", &k); ^