How do I use const methods in C++?

How do I use const methods in C++?

In C++, a const method is a member function that cannot modify the object it belongs to. You declare it by adding the keyword 'const' after the method's parameter list.

Can you give me an example of a const method?

Sure! Here's a simple example:

class MyClass {
public:
    int getValue() const {
        return value;
    }
private:
    int value;
};

In this example, getValue is a const method that returns the value without modifying the object.

What happens if I try to modify a member variable in a const method?

If you try to modify a member variable in a const method, the compiler will throw an error, as it violates the constness of the method.

Are there any best practices for using const methods?

Yes! It's a good practice to use const methods whenever possible to ensure that your objects remain unchanged, which can help prevent bugs and improve code readability.