Given the following class definition, what is missing? class ItemClass \{ public: ItemClass(int newSize, float newCost); int getSize(); float getCost(); void setSize (int newSize); void setCost(float newCost); private: int size; float cost; \}; accessor functions a default constructor mutator functions nothing

The class definition you've provided includes: - **Constructor**: `ItemClass(int newSize, float newCost)` - **Accessor Functions**: `getSize()` and `getCost()` - **Mutator Functions**: `setSize(int newSize)` and `setCost(float newCost)` - **Private Members**: `int size;` and `float cost;` However, **what's missing is a default constructor**. A default constructor is a constructor that can be called with no arguments. If you intend to create objects of `ItemClass` without specifying initial `size` and `cost`, you'll need to define a default constructor. **Example of a Default Constructor:** ```cpp ItemClass() : size(0), cost(0.0f) {} ``` This constructor initializes `size` to `0` and `cost` to `0.0f` by default. **Why It's Important:** - **Flexibility**: Allows creating objects without immediately setting their attributes. - **Compatibility**: Some containers and frameworks require a default constructor to manage objects properly. **Conclusion:** Your class is missing **a default constructor**. Adding one will make your class more flexible and compatible with various C++ features and libraries. **Answer:** a default constructor