What are parameterized constructors in C++?

What are parameterized constructors in C++?

Parameterized constructors are special constructors that take arguments to initialize an object with specific values.

Can you give me an example of a parameterized constructor?

Sure! Here's a simple example:

class Rectangle {
public:
    int width, height;
    Rectangle(int w, int h) {  // Parameterized constructor
        width = w;
        height = h;
    }
};

In this example, the Rectangle class has a parameterized constructor that initializes the width and height.

What happens if I don't provide parameters when creating an object?

If you don't provide parameters, and if there's no default constructor defined, you'll get a compilation error. It's important to define a default constructor if you want to create objects without parameters.

Can I have multiple parameterized constructors in a class?

Yes, you can have multiple parameterized constructors in a class, as long as they have different parameter lists. This is called constructor overloading.