What are the best practices for using const in C++?

What are the best practices for using const in C++?

Using const in C++ helps to prevent unintended modifications. It's best to use it for function parameters, return types, and member functions that don't modify the object.

Can you give an example of using const with function parameters?

Sure! You can declare a function parameter as const to ensure it cannot be modified within the function. For example: void printValue(const int value) { std::cout << value; }.

What about using const with class member functions?

When you declare a member function as const, it guarantees that the function will not modify any member variables. For example: void display() const { std::cout << myVar; }.

Are there any downsides to using const?

The main downside is that it can make your code less flexible, as you cannot modify const variables. However, the benefits of safety and clarity usually outweigh this.