Compilare: user.cpp: In member function ‘huge& huge::operator*(long int)’: user.cpp:82:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long i=1;i<=x[0];i++) ^ user.cpp: In member function ‘huge& huge::operator+(long int)’: user.cpp:100:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long i=1;i<=x[0];i++) ^ user.cpp:98:10: warning: unused variable ‘i’ [-Wunused-variable] long i; ^ user.cpp: In function ‘int main()’: user.cpp:129:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tort.in","r",stdin); ^ user.cpp:130:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tort.out","w",stdout); ^ user.cpp:132:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld%ld",&a,&b); ^