Compilare: user.cpp: In member function ‘int HugeN::cmp(const HugeN&)’: user.cpp:100:9: warning: unused variable ‘i’ [-Wunused-variable] int i; ^ user.cpp: In member function ‘HugeN HugeN::operator+=(const HugeN&)’: user.cpp:134:20: warning: unused variable ‘i’ [-Wunused-variable] int tr=0, aux, i; ^ user.cpp: In member function ‘HugeN HugeN::operator-(const HugeN&)’: user.cpp:151:9: warning: unused variable ‘aux’ [-Wunused-variable] int aux, tr=0; ^ user.cpp: In member function ‘HugeN HugeN::operator-=(const HugeN&)’: user.cpp:174:15: warning: unused variable ‘aux’ [-Wunused-variable] int tr=0, aux, i; ^ user.cpp:174:20: warning: unused variable ‘i’ [-Wunused-variable] int tr=0, aux, i; ^ user.cpp: In member function ‘HugeN HugeN::operator-(int)’: user.cpp:197:15: warning: unused variable ‘aux’ [-Wunused-variable] int tr=0, aux, i; ^ user.cpp:197:20: warning: unused variable ‘i’ [-Wunused-variable] int tr=0, aux, i; ^ user.cpp: In function ‘int main()’: user.cpp:346:33: 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:347:35: 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:351:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld", &k); ^