is there interfaces in c++ like
Interfaces in C++
In C++, there is a concept called "interfaces," although they are not explicitly defined as such in the language. Instead, C++ achieves interface-like behavior through the use of abstract classes and pure virtual functions.
An abstract class is a class that cannot be instantiated and is meant to serve as a base class for other classes. It contains at least one pure virtual function, which is a virtual function declared with the = 0
specifier and has no implementation in the base class. By declaring a function as pure virtual, the base class effectively defines an interface that derived classes must implement.
Here is an example of an abstract class in C++:
class Interface {
public:
virtual void method() = 0; // pure virtual function
};
Any class that derives from the Interface
class must provide an implementation for the method()
function. This enforces the contract defined by the interface.
class MyClass : public Interface {
public:
void method() override {
// implementation of the method
}
};
By using abstract classes and pure virtual functions, C++ allows you to achieve interface-like behavior. Derived classes can implement the required functions, and objects of those derived classes can be treated as instances of the interface.
It's worth noting that C++ does not have a separate keyword or construct specifically for interfaces, as some other programming languages do. Instead, it relies on the concept of abstract classes and pure virtual functions to achieve similar functionality.