Compilare: user.cpp: In member function ‘hugeN& hugeN::operator+=(long long int)’: user.cpp:41:30: warning: operation on ‘i’ may be undefined [-Wsequence-point] x[++i]=x[i]+ad%10; ^ user.cpp: In function ‘int main()’: user.cpp:66:18: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[1000001]’ [-Wformat=] scanf("%s",&c); ^ user.cpp:68:20: warning: format ‘%lld’ expects argument of type ‘long long int*’, but argument 2 has type ‘int*’ [-Wformat=] scanf("%lld",&d); ^ user.cpp:65:9: warning: unused variable ‘i’ [-Wunused-variable] int i,j,d; ^ user.cpp:65:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,d; ^ user.cpp:62:33: 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:63:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("next.out","w",stdout); ^ user.cpp:66:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&c); ^ user.cpp:68:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&d); ^