Composition In Class Diagram with Examples

Composition In Class Diagram with Examples.

#include <iostream>
using namespace std;
class Animal {
   public:
    void eat() {
        cout << "I can eat!" << endl;
    }
    void sleep() {
        cout << "I can sleep!" << endl;
    }
};
class Dog
{
   public:
   	Animal x;  
  
};
int main() {
// Create object of the Dog class
    Dog dog1;
    // Calling members of the base class
    dog1.x.eat();
    return 0;
}

#include <iostream>

using namespace std;

class Animal {

public:

void eat() {

cout << "I can eat!" << endl;

}

void sleep() {

cout << "I can sleep!" << endl;

}

};

class Dog

{

public:

Animal x;

};

int main() {

// Create object of the Dog class

Dog dog1;

// Calling members of the base class

dog1.x.eat();

return 0;

}

Examples of Composition

Every motorcycle has tires
Every university has different departments.
Every house has rooms.
A car has a battery.
The sports club has Cricket playgrounds.
The school has a canteen.
Human has heart.

When we can use composition?

we can use composition in cases where one object “has” (or is part of) another object.

Examples of Composition

When we can use composition?

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