What are initialization lists in C++?

What are initialization lists in C++?

Initialization lists in C++ are used to initialize member variables of a class before the constructor body executes.

Can you give me an example of how to use an initialization list?

Sure! Here's a simple example:

class Point {
public:
    int x, y;
    Point(int xVal, int yVal) : x(xVal), y(yVal) {}
};

In this example, x and y are initialized using the initialization list.

Why should I use initialization lists instead of assignment in the constructor?

Using initialization lists can be more efficient, especially for const or reference members, as they must be initialized upon creation.

Are there any cases where I shouldn't use initialization lists?

Yes, if you need to perform complex logic or checks before initializing, you might prefer to use the constructor body instead.