I\'m having an issue with a C++ assignment, we had to create a menu using an arr

Question

I'm having an issue with a C++ assignment, we had to create a menu using an array, and then change the array to a vector, and I for the life of me, can't figure out why I'm running into a few errors.
ORIGINAL CODE:

void Menu::addMenu(string descript, void(*f) (void))
{
   if (count < MAXCOUNT)
   {
       mi[count].func = f;
       mi[count].descript = descript;
       count++;

   }

}

void Menu::runMenu()
{
   for (;;)
   {
       system("CLS");
       for (int i = 0; i < count; i++)
       {
           cout << mi[i].descript << endl;
       }
       runSelection();
   }

}

NEW CODE:

void Menu::addMenu(string descript, void(*f) (void))
{
   if (count < mi.size())
   {
       mi[count].func = f;
       mi[count].descript = descript;
       count++;

   }

}

void Menu::runMenu()
{
   for (;;)
   {
       system("CLS");
       for (int i = 0; i < count; i++)
       {
           cout << mi.push_back() << endl;
       }
       runSelection();
   }

}

I have the vector declared as follows inside of a class
    vector<menuItem> mi;
The vector uses a type made by a struct.

struct menuItem
{
   void(*func) ();
   string descript;

};

And I keep getting this error
error C2661: 'std::vector<menuItem,std::allocator<_Ty>>::push_back' : no overloaded function takes 0 arguments
1>          with
1>          [
1>              _Ty=menuItem
1>          ]

Explanation / Answer

That is because you need to include "#include<vector>" in your program.

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