Compilare: user.cpp: In destructor ‘BigNo::~BigNo()’: user.cpp:23:32: warning: NULL used in arithmetic [-Wpointer-arith] if (*(v+lg-1)!=NULL) ^ user.cpp: In constructor ‘BigNo::BigNo(const char*)’: user.cpp:60:15: warning: unused variable ‘aux’ [-Wunused-variable] short int*aux; ^ user.cpp: In constructor ‘BigNo::BigNo(long long int)’: user.cpp:88:12: warning: converting to non-pointer type ‘short int’ from NULL [-Wconversion-null] *(v+lg)=NULL; ^ user.cpp:73:9: warning: unused variable ‘i’ [-Wunused-variable] int i;long long aux=nr; ^ user.cpp: In constructor ‘BigNo::BigNo(int)’: user.cpp:108:12: warning: converting to non-pointer type ‘short int’ from NULL [-Wconversion-null] *(v+lg)=NULL; ^ user.cpp:93:9: warning: unused variable ‘i’ [-Wunused-variable] int i;int aux=nr; ^ user.cpp: In member function ‘BigNo& BigNo::operator++()’: user.cpp:132:16: warning: unused variable ‘aux’ [-Wunused-variable] short int* aux; ^ user.cpp:146:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In member function ‘BigNo& BigNo::operator--()’: user.cpp:151:16: warning: unused variable ‘aux’ [-Wunused-variable] short int* aux; ^ user.cpp:169:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^