Chapter 13: Problem 14

When defining an array of class objects, how do you pass arguments to the constructor for each object in the array?

Short Answer

Expert verified

Question: Explain the process of defining an array of class objects and passing arguments to their constructors for each object in C++. Answer: To define an array of class objects and pass arguments to their constructors for each object in C++, follow these steps: 1. Create a class with a constructor that takes arguments and sets the object properties using those arguments. 2. Declare an array of objects of the created class. 3. Use a loop to create and initialize each object in the array with the constructor arguments individually. 4. Verify the successful initialization of each object by printing out their properties.

Step by step solution

Create a class with a constructor

First, create a class with properties and a constructor to take arguments. The constructor will set the values of the object's properties using the given arguments. ```cpp class MyClass { private: int x; public: MyClass(int a) { x = a; } int getX() { return x; } }; ```

Declare an array of objects from the class

Declare an array of objects of the created class. You cannot directly pass the arguments while declaring the array because the constructor will be called once the object is created. Here, declare an array of size n. ```cpp int n = 3; MyClass myObjectsArray[n]; ```

Intialize each object in the array individually

As we cannot directly pass the arguments when declaring the array, we need to use a loop to create and initialize each object in the array with the constructor arguments. ```cpp for (int i = 0; i < n; ++i) { myObjectsArray[i] = MyClass(i + 1); } ```

Verify the results

To ensure that each object in the array has been initialized with the constructor arguments, print out the properties of the objects (using the getX() method). ```cpp for (int i = 0; i < n; ++i) { cout << "Value of x for object " << i << ": " << myObjectsArray[i].getX() << endl; } ``` This will print out the values stored in the property 'x' for each object, confirming that the constructor arguments were successfully passed and used.

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When defining an array of class objects, how do you pass arguments to the constructor for each object in the array?

Short Answer

Step by step solution

Create a class with a constructor

Declare an array of objects from the class

Intialize each object in the array individually

Verify the results

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