I have this snippet of the code

Account& Company::findAccount(int id){
        for(list<Account>::const_iterator i = listOfAccounts.begin(); i != listOfAccounts.end(); ++i){
            if(i->nID == id){
                return *i;
            }
        }
        return 0;
    }

Is this right way to return 0 if I didn't find appropriate account? cause I receive an error:

no match for 'operator!' in '!((Company*)this)->Company::findAccount(id)'

I use it this way:

if(!(findAccount(id))){
            throw "hey";
          }

thanks in advance