friend class?

[N8RzwA7f]

Hi,
I'm trying to access the vector foodOrder from customerOrder (via printorder) by declaring it a friend but it's not working?

  class food : virtual public someOtherClass {
   friend class customerOrder;
   public:
      food();
      //copy constructor
      food(const food& foods);
      ~food();
      ...
   private:
      ...
      std::vector <food*> foodOrder;
};
class customerOrder   {
   public:
       customerOrder();
       ~customerOrder();
       void printOrder(); // get a "foodOrder was not declared in this scope" error
   private:
       ;
       
};

thanks

[Peter87]

To access a non-static member of the class you need to have an instance of the class. I mean, you can't just magically access foodOrder from within printOrder() because which food object's foodOrder is it that you want?

[N8RzwA7f]

Oke so I added a food object in customerOrder in private as well:
food neworder;
and used it in printorder so:
newOrder.foodOrder[i]->foodName ;


does that look oke? I'm not getting errors anymore about that , but now this:


Now I'm getting some other error as well :
template<typename _CharT, typename _Traits, typename _Alloc>
inline bool
operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
const _CharT* __rhs)
{ return __lhs.compare(__rhs) == 0; } //it complained here.

do I need to create a copy constructor or such for this last error?
thanks :)

[N8RzwA7f]

can anyone help , I'm very confused by the error I'm getting.

[N8RzwA7f]

here's my code now, or parts of it

...
class food : virtual public otherclass {
   friend class customerOrder;
   public:
      food();
      ~food();
      void addItem();
      void setPrice();
      bool operator==(const std::string foodString);
      ...
   private:
      food* foodItem;
      ...
      std::vector <food*> foodOrder;
};
class customerOrder   {
   public:
       customerOrder();
       ~customerOrder();
       void printOrder();
   private:
       food newOrder;
       
};
food::~food(){
    foodItem = 0;
}
...
void food::addItem(){
    int count = 0;
    std::cout << std::endl;
    std::cout << "Enter the food item from chosen " << userChoice << " menu :" << std::endl;
    bool done = false;
    while(done == false) {
       foodItem = new food; 
       userChoice = "?";
       std::cin >> userChoice;
       foodItem->foodName = userChoice;
       std::cout << "How many of these ?... " << std::endl;
       std::cin >> count;
       while (count != 0) {
        foodOrder.push_back(foodItem);
        --count;
       }
       delete foodItem;
       std::cout << "Would you like to order more items? Yes or No ?" ;
       std::cin >> userChoice;
       if ((userChoice == "no") || (userChoice == "No") || (userChoice == "nO") || (userChoice == "NO")){
              done = true;
       } else {
           std::cout << "Enter the next food item..." << std::endl;
       }
       
    }
}
bool food::operator ==(const std::string foodString) {
    return( this->foodName == foodString);
}
void food::setPrice(){
    float priceAr[] = {1.00, 1.50, 2.00, 3.00, 4.00, 5.00, 6.00, 7.00, 8.00};
    for(size_t i = 0; i < foodOrder.size();++i) {
     std::transform(foodName.begin(), foodName.end(),foodName.begin(), ::toupper);  
     if(foodOrder.at(i)->foodName == "PIZZA"){   //the problem is here  
                                               // and i get the above error  .
     }
...

thanks