Interfaces - Rybd04/2143-OOP GitHub Wiki

#include <iostream>
using namespace std;

// Interface (pure abstract class)
class Printable {
public:
    virtual void print() = 0;  // Pure virtual function
    virtual void info() = 0;   // Pure virtual function
};

// Concrete class implementing the interface
class Document : public Printable {
public:
    void print() override {
        cout << "Printing Document..." << endl;
    }

    void info() override {
        cout << "This is a document." << endl;
    }
};

// Another class implementing the same interface
class Image : public Printable {
public:
    void print() override {
        cout << "Printing Image..." << endl;
    }

    void info() override {
        cout << "This is an image." << endl;
    }
};

int main() {
    Document doc;
    Image img;

    doc.print();  // Printing Document...
    doc.info();   // This is a document.

    img.print();  // Printing Image...
    img.info();   // This is an image.

    return 0;
}