What are some examples of using const objects in C++?

What are some examples of using const objects in C++?

In C++, a const object is an object whose value cannot be changed after it is initialized. For example:

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

const MyClass obj(10);
// obj.getValue() returns 10
// obj.value_ = 20; // This will cause a compilation error

Can you explain why we use const objects?

Using const objects helps to ensure that the data remains unchanged, which can prevent bugs and make the code easier to understand. It also allows the compiler to optimize the code better.

Are there any limitations to using const objects?

Yes, the main limitation is that you cannot modify the object after it is created. This means you need to ensure that all necessary values are set during initialization.

Can you give another example with const pointers?

Sure! Here's an example with const pointers:

int value = 5;
const int* ptr = &value;
// *ptr = 10; // This will cause a compilation error