Clone a Directed Graph

Here given code implementation process.

//C program
//Clone a Directed Graph
#include <stdio.h>

#include <stdlib.h>

struct AjlistNode {
	int vId; //Vertices id
	struct AjlistNode *next;
};

struct Graph {
	int data; //node key value
	struct AjlistNode *next;
};

int size = 6;

//set node key value
void set_data(struct Graph *node) {
	if (node != NULL && size > 0) {
		int index = 0;
		for (index; index < size; index++) {
			//set vertic node data
			node[index].data = index; //set node key
			//Initial no AjlistNode
			//set NULL Value
			node[index].next = NULL;
		}
	} else {
		printf("Vertic Node is Empty");
	}
}
//Add Edge from Two given Nodes
void add_edge(struct Graph *node, int V, int E) {
	//add edge form V to E
	//V and E is Node location
	if (V < size && E < size) {
		//first create Adjacency node
		struct AjlistNode *newEdge = (struct AjlistNode *) malloc(sizeof(struct AjlistNode));
		if (newEdge != NULL) {

			newEdge->next = NULL;
			newEdge->vId = E;

			struct AjlistNode *temp = node[V].next;

			if (temp == NULL) {
				node[V].next = newEdge;
			} else {
				//Add node at last
				while (temp->next != NULL) {
					temp = temp->next;
				}
				temp->next = newEdge;
			}
		} else {
			printf("\n Memory overflow");
		}
	} else {
		//not valid Vertices
		printf("Invalid Node Vertices %d  %d", V, E);
	}
}

//Display Adjacency list of vertex
void print_graph(struct Graph *node) {
	if (node != NULL) {
		struct AjlistNode *temp = NULL;
		for (int index = 0; index < size; index++) {
			printf("\n Adjacency list of vertex %d  :", index);
			temp = node[index].next;
			while (temp != NULL) {
				//temp->vId is graph node vertices
				//in this case temp->vId is same as 
				//node[temp->vId].data

				printf("  %d", node[temp->vId].data);
				temp = temp->next;
			}
		}
	} else {
		printf("Empty Graph");
	}
}
struct Graph *clone_graph(struct Graph *first) {

	struct Graph *second = (struct Graph *) malloc(sizeof(struct Graph) *size);

	if (first != NULL) {
		struct AjlistNode *temp = NULL;
		set_data(second);

		for (int index = 0; index < size; index++) {

			temp = first[index].next;

			while (temp != NULL) {
				//add edges
				add_edge(second, index, temp->vId);
				temp = temp->next;
			}
		}

	}
	return second;
}
int main() {
	struct Graph *g1 = NULL;
	g1 = (struct Graph *) malloc(sizeof(struct Graph) *size);

	if (g1 == NULL) {
		printf("\n Memory overflow");

	} else {
		//First set node keys
		set_data(g1);
		//Connected two node with Edges
		add_edge(g1, 0, 0);
		add_edge(g1, 1, 0);
		add_edge(g1, 1, 4);
		add_edge(g1, 1, 5);
		add_edge(g1, 2, 0);
		add_edge(g1, 2, 4);
		add_edge(g1, 2, 5);
		add_edge(g1, 3, 4);
		add_edge(g1, 3, 5);
		add_edge(g1, 5, 4);
		printf(" First Graph ");
		print_graph(g1);

		struct Graph *g2 = clone_graph(g1);

		printf("\n\n Clone Graph");

		print_graph(g2);

	}
	return 0;
}

Output

 First Graph
 Adjacency list of vertex 0  :  0
 Adjacency list of vertex 1  :  0  4  5
 Adjacency list of vertex 2  :  0  4  5
 Adjacency list of vertex 3  :  4  5
 Adjacency list of vertex 4  :
 Adjacency list of vertex 5  :  4

 Clone Graph
 Adjacency list of vertex 0  :  0
 Adjacency list of vertex 1  :  0  4  5
 Adjacency list of vertex 2  :  0  4  5
 Adjacency list of vertex 3  :  4  5
 Adjacency list of vertex 4  :
 Adjacency list of vertex 5  :  4
// C++ program
// Clone a Directed Graph
#include<iostream>

using namespace std;
class AjlistNode {
	public:

	//Vertices node key
	int id;
	AjlistNode *next;
	AjlistNode(int id) {
		//Set value of node key
		this->id = id;
		this->next = NULL;
	}
};
class Vertices {
	public:
	int data;
	AjlistNode *next;
    Vertices()
    {
      this->data = 0;
      this->next = NULL;
    }
	Vertices(int data) {
		this->data = data;
		this->next = NULL;
	}
};
class MyGraph {
	public:

	//number of Vertices
	int size;
	Vertices *node;
	MyGraph(int size) {
		this->size = size;
		this->node = new Vertices[size];
		//set initial values of graph node
		this->set_data();
	}
	//Set initial node value
	void set_data() {
		if (this->node == NULL) {
			cout << "\nEmpty Graph";
		} else {
			int index = 0;
			while (index < this->size) {
				this->node[index] = index;
				index++;
			}
		}
	}
	//Connect two node
	void add_edge(int start, int last) {
		AjlistNode *newEdge = new AjlistNode(last);
		if (this->node[start].next == NULL) {
			//Include first adjacency list node of location start 
			this->node[start].next = newEdge;
		} else {
			AjlistNode *temp = this->node[start].next;
			//Add new node at the last of edge
			while (temp->next != NULL) {
				temp = temp->next;
			}
			//Add node 
			temp->next = newEdge;
		}
	}
	//Display graph elements
	void print_graph() {
		if (this->size > 0 &&
			this->node != NULL) {
			int index = 0;
			while (index < this->size) {
				cout << "\nAdjacency list of vertex " << index << " : ";
				AjlistNode *temp = this->node[index].next;
				while (temp != NULL) {
					cout << this->node[temp->id].data << " ";
					temp = temp->next;
				}
				index++;
			}
		}
	}
	MyGraph clone_graph() {
		//First create same number of nodes
		//Assume given graph are contains nodes
		MyGraph graph =  MyGraph(this->size);
		if (this->node != NULL) {
			AjlistNode *temp = NULL;
			for (int index = 0; index < this->size; index++) {
				temp = this->node[index].next;
				while (temp != NULL) {
					//Add edges of new graph
					graph.add_edge(index, temp->id);
					temp = temp->next;
				}
			}
		}
		return graph;
	}
};
int main() {
	MyGraph g1 = MyGraph(6);
	//Connected two node with Edges
	g1.add_edge(0, 0);
	g1.add_edge(1, 0);
	g1.add_edge(1, 4);
	g1.add_edge(1, 5);
	g1.add_edge(2, 0);
	g1.add_edge(2, 4);
	g1.add_edge(2, 5);
	g1.add_edge(3, 4);
	g1.add_edge(3, 5);
	g1.add_edge(5, 4);
	cout << "First Graph ";
	g1.print_graph();
	MyGraph g2 = g1.clone_graph();
	cout << "\n\nClone Graph";
	g2.print_graph();
	return 0;
}

Output

First Graph
Adjacency list of vertex 0 : 0
Adjacency list of vertex 1 : 0 4 5
Adjacency list of vertex 2 : 0 4 5
Adjacency list of vertex 3 : 4 5
Adjacency list of vertex 4 :
Adjacency list of vertex 5 : 4

Clone Graph
Adjacency list of vertex 0 : 0
Adjacency list of vertex 1 : 0 4 5
Adjacency list of vertex 2 : 0 4 5
Adjacency list of vertex 3 : 4 5
Adjacency list of vertex 4 :
Adjacency list of vertex 5 : 4
// Java program
// Clone a Directed Graph

class AjlistNode {
	//Vertices node key
	public int id;
	public AjlistNode next;

	public AjlistNode(int id) {
		//Set value of node key
		this.id = id;
		this.next = null;
	}
}
class Vertices {

	public int data;
	public AjlistNode next;

	public Vertices(int data) {
		this.data = data;
		this.next = null;
	}
}

public class MyGraph {


	//number of Vertices
	private int size;

	private Vertices[] node;

	public MyGraph(int size) {

		this.size = size;
		this.node = new Vertices[size];
		//set initial values of graph node
		this.set_data();


	}

	//Set initial node value
	public void set_data() {
		if (node == null) {
			System.out.println("\nEmpty Graph");
		} else {

			int index = 0;

			while (index < size) {

				node[index] = new Vertices(index);

				index++;
			}
		}
	}


	//Connect two node
	public void add_edge(int start, int last) {
		AjlistNode newEdge = new AjlistNode(last);

		if (node[start].next == null) {
			//Include first adjacency list node of location start 
			node[start].next = newEdge;
		} else {
			AjlistNode temp = node[start].next;
			//Add new node at the last of edge
			while (temp.next != null) {
				temp = temp.next;
			}
			//Add node 
			temp.next = newEdge;
		}
	}
	//Display graph elements
	public void print_graph() {

		if (size > 0 && node != null) {
			int index = 0;
			while (index < size) {
				System.out.print("\nAdjacency list of vertex " + index + " : ");
				AjlistNode temp = node[index].next;
				while (temp != null) {
					System.out.print(node[temp.id].data + "  ");
					temp = temp.next;
				}
				index++;
			}
		}
	}
	public MyGraph clone_graph() {

		//First create same number of nodes
		//Assume given graph are contains nodes
		MyGraph graph = new MyGraph(this.size);

		if (this.node != null) {

			AjlistNode temp = null;

			for (int index = 0; index < this.size; index++) {

				temp = this.node[index].next;

				while (temp != null) {
					//Add edges of new graph
					graph.add_edge(index, temp.id);

					temp = temp.next;
				}
			}

		}

		return graph;
	}



	public static void main(String[] args) {


		MyGraph g1 = new MyGraph(6);
		//Connected two node with Edges
		g1.add_edge(0, 0);
		g1.add_edge(1, 0);
		g1.add_edge(1, 4);
		g1.add_edge(1, 5);
		g1.add_edge(2, 0);
		g1.add_edge(2, 4);
		g1.add_edge(2, 5);
		g1.add_edge(3, 4);
		g1.add_edge(3, 5);
		g1.add_edge(5, 4);

		System.out.print("First Graph ");
		g1.print_graph();

		MyGraph g2 = g1.clone_graph();
		System.out.print("\n\nClone Graph");
		g2.print_graph();
	}
}

Output

First Graph
Adjacency list of vertex 0 : 0
Adjacency list of vertex 1 : 0 4 5
Adjacency list of vertex 2 : 0 4 5
Adjacency list of vertex 3 : 4 5
Adjacency list of vertex 4 :
Adjacency list of vertex 5 : 4

Clone Graph
Adjacency list of vertex 0 : 0
Adjacency list of vertex 1 : 0 4 5
Adjacency list of vertex 2 : 0 4 5
Adjacency list of vertex 3 : 4 5
Adjacency list of vertex 4 :
Adjacency list of vertex 5 : 4
// C# program
// Clone a Directed Graph
using System;
class AjlistNode {
	//Vertices node key
	public int id;
	public AjlistNode next;
	public AjlistNode(int id) {
		//Set value of node key
		this.id = id;
		this.next = null;
	}
}
class Vertices {
	public int data;
	public AjlistNode next;
	public Vertices(int data) {
		this.data = data;
		this.next = null;
	}
}
public class MyGraph {
	//number of Vertices
	private int size;
	private Vertices[] node;
	public MyGraph(int size) {
		this.size = size;
		this.node = new Vertices[size];
		this.set_data();
	}
	//Set initial node value
	public void set_data() {
		if (node == null) {
			Console.WriteLine("\nEmpty Graph");
		} else {
			int index = 0;
			while (index < size) {
				node[index] = new Vertices(index);
				index++;
			}
		}
	}
	//Connect two node
	public void add_edge(int start, int last) {
		AjlistNode newEdge = new AjlistNode(last);
		if (node[start].next == null) {
			//Include first adjacency list node of location start 
			node[start].next = newEdge;
		} else {
			AjlistNode temp = node[start].next;
			//Add new node at the last of edge
			while (temp.next != null) {
				temp = temp.next;
			}
			//Add node 
			temp.next = newEdge;
		}
	}
	//Display graph elements
	public void print_graph() {
		if (size > 0 &&
			node != null) {
			int index = 0;
			while (index < size) {
				Console.Write("\nAdjacency list of vertex " + index + " : ");
				AjlistNode temp = node[index].next;
				while (temp != null) {
					Console.Write(node[temp.id].data + " ");
					temp = temp.next;
				}
				index++;
			}
		}
	}
	public MyGraph clone_graph() {
		//First create same number of nodes
		//Assume given graph are contains nodes
		MyGraph graph = new MyGraph(this.size);
		if (this.node != null) {
			AjlistNode temp = null;
			for (int index = 0; index < this.size; index++) {
				temp = this.node[index].next;
				while (temp != null) {
					graph.add_edge(index, temp.id);
					temp = temp.next;
				}
			}
		}
		return graph;
	}
	public static void Main(String[] args) {
		MyGraph g1 = new MyGraph(6);
		g1.add_edge(0, 0);
		g1.add_edge(1, 0);
		g1.add_edge(1, 4);
		g1.add_edge(1, 5);
		g1.add_edge(2, 0);
		g1.add_edge(2, 4);
		g1.add_edge(2, 5);
		g1.add_edge(3, 4);
		g1.add_edge(3, 5);
		g1.add_edge(5, 4);
		Console.Write("First Graph ");
		g1.print_graph();
		MyGraph g2 = g1.clone_graph();
		Console.Write("\n\nClone Graph");
		g2.print_graph();
	}
}

Output

First Graph
Adjacency list of vertex 0 : 0
Adjacency list of vertex 1 : 0 4 5
Adjacency list of vertex 2 : 0 4 5
Adjacency list of vertex 3 : 4 5
Adjacency list of vertex 4 :
Adjacency list of vertex 5 : 4

Clone Graph
Adjacency list of vertex 0 : 0
Adjacency list of vertex 1 : 0 4 5
Adjacency list of vertex 2 : 0 4 5
Adjacency list of vertex 3 : 4 5
Adjacency list of vertex 4 :
Adjacency list of vertex 5 : 4
<?php
// Php program
// Clone a Directed Graph
class AjlistNode {
	//Vertices node key

	public $id;
	public $next;

	function __construct($id) {
		//Set value of node key
		$this->id = $id;
		$this->next = null;
	}
}
class Vertices {
	public $data;
	public $next;

	function __construct($data) {
		$this->data = $data;
		$this->next = null;
	}
}
class MyGraph {
	//number of Vertices

	private $size;
	private $node;

	function __construct($size) {
		$this->size = $size;
		$this->node = array_fill(0, $size, 0);
		//set initial values of graph node
		$this->set_data();
	}
	//Set initial node value

	public 	function set_data() {
		if ($this->node == null) {
			echo("\nEmpty Graph");
		} else {
			$index = 0;
			while ($index < $this->size) {
				$this->node[$index] = new Vertices($index);
				$index++;
			}
		}
	}
	//Connect two node

	public 	function add_edge($start, $last) {
		$newEdge = new AjlistNode($last);
		if ($this->node[$start]->next == null) {
			//Include first adjacency list node of location start 
			$this->node[$start]->next = $newEdge;
		} else {
			$temp = $this->node[$start]->next;
			//Add new node at the last of edge
			while ($temp->next != null) {
				$temp = $temp->next;
			}
			//Add node 
			$temp->next = $newEdge;
		}
	}
	//Display graph elements

	public 	function print_graph() {
		if ($this->size > 0 &&
			$this->node != null) {
			$index = 0;
			while ($index < $this->size) {
				echo("\nAdjacency list of vertex ". $index ." : ");
				$temp = $this->node[$index]->next;
				while ($temp != null) {
					echo($this->node[$temp->id]->data ." ");
					$temp = $temp->next;
				}
				$index++;
			}
		}
	}
	public 	function clone_graph() {
		//First create same number of nodes
		//Assume given graph are contains nodes
		$graph = new MyGraph($this->size);
		if ($this->node != null) {
			$temp = null;
			for ($index = 0; $index < $this->size; $index++) {
				$temp = $this->node[$index]->next;
				while ($temp != null) {
					//Add edges of new graph
					$graph->add_edge($index, $temp->id);
					$temp = $temp->next;
				}
			}
		}
		return $graph;
	}
}

function main() {
	$g1 = new MyGraph(6);
	//Connected two node with Edges
	$g1->add_edge(0, 0);
	$g1->add_edge(1, 0);
	$g1->add_edge(1, 4);
	$g1->add_edge(1, 5);
	$g1->add_edge(2, 0);
	$g1->add_edge(2, 4);
	$g1->add_edge(2, 5);
	$g1->add_edge(3, 4);
	$g1->add_edge(3, 5);
	$g1->add_edge(5, 4);
	echo("First Graph ");
	$g1->print_graph();
	$g2 = $g1->clone_graph();
	echo("\n\nClone Graph");
	$g2->print_graph();

}
main();

Output

First Graph
Adjacency list of vertex 0 : 0
Adjacency list of vertex 1 : 0 4 5
Adjacency list of vertex 2 : 0 4 5
Adjacency list of vertex 3 : 4 5
Adjacency list of vertex 4 :
Adjacency list of vertex 5 : 4

Clone Graph
Adjacency list of vertex 0 : 0
Adjacency list of vertex 1 : 0 4 5
Adjacency list of vertex 2 : 0 4 5
Adjacency list of vertex 3 : 4 5
Adjacency list of vertex 4 :
Adjacency list of vertex 5 : 4
// Node Js program
// Clone a Directed Graph
class AjlistNode {
	//Vertices node key

	constructor(id) {
		//Set value of node key
		this.id = id;
		this.next = null;
	}
}
class Vertices {
	constructor(data) {
		this.data = data;
		this.next = null;
	}
}
class MyGraph {
	//number of Vertices

	constructor(size) {
		this.size = size;
		this.node = Array(size).fill(null);
		//set initial values of graph node
		this.set_data();
	}

	//Set initial node value
	set_data() {
		if (this.node == null) {
			process.stdout.write("\nEmpty Graph");
		} else {
			var index = 0;
			while (index < this.size) {
				this.node[index] = new Vertices(index);
				index++;
			}
		}
	}

	//Connect two node
	add_edge(start, last) {
		var newEdge = new AjlistNode(last);
		if (this.node[start].next == null) {
			//Include first adjacency list node of location start 
			this.node[start].next = newEdge;
		} else {
			var temp = this.node[start].next;
			//Add new node at the last of edge
			while (temp.next != null) {
				temp = temp.next;
			}

			//Add node 
			temp.next = newEdge;
		}
	}

	//Display graph elements
	print_graph() {
		if (this.size > 0 &&
			this.node != null) {
			var index = 0;
			while (index < this.size) {
				process.stdout.write("\nAdjacency list of vertex " + index + " : ");
				var temp = this.node[index].next;
				while (temp != null) {
					process.stdout.write(this.node[temp.id].data + " ");
					temp = temp.next;
				}
				index++;
			}
		}
	}
	clone_graph() {
		//First create same number of nodes
		//Assume given graph are contains nodes
		var graph = new MyGraph(this.size);
		if (this.node != null) {
			var temp = null;
			for (var index = 0; index < this.size; index++) {
				temp = this.node[index].next;
				while (temp != null) {
					//Add edges of new graph
					graph.add_edge(index, temp.id);
					temp = temp.next;
				}
			}
		}

		return graph;
	}
}

function main(args) {
	var g1 = new MyGraph(6);
	//Connected two node with Edges
	g1.add_edge(0, 0);
	g1.add_edge(1, 0);
	g1.add_edge(1, 4);
	g1.add_edge(1, 5);
	g1.add_edge(2, 0);
	g1.add_edge(2, 4);
	g1.add_edge(2, 5);
	g1.add_edge(3, 4);
	g1.add_edge(3, 5);
	g1.add_edge(5, 4);
	process.stdout.write("First Graph ");
	g1.print_graph();
	var g2 = g1.clone_graph();
	process.stdout.write("\n\nClone Graph");
	g2.print_graph();
}

main();

Output

First Graph
Adjacency list of vertex 0 : 0
Adjacency list of vertex 1 : 0 4 5
Adjacency list of vertex 2 : 0 4 5
Adjacency list of vertex 3 : 4 5
Adjacency list of vertex 4 :
Adjacency list of vertex 5 : 4

Clone Graph
Adjacency list of vertex 0 : 0
Adjacency list of vertex 1 : 0 4 5
Adjacency list of vertex 2 : 0 4 5
Adjacency list of vertex 3 : 4 5
Adjacency list of vertex 4 :
Adjacency list of vertex 5 : 4
#  Python 3 program
#  Clone a Directed Graph
class AjlistNode :
	
	def __init__(self, id) :
		# Set value of node key
		self.id = id
		self.next = None
	

class Vertices :
	
	def __init__(self, data) :
		self.data = data
		self.next = None
	

class MyGraph :
	
	def __init__(self, size) :
		self.size = size
		self.node = [0] * size
		# set initial values of graph node
		self.set_data()
	
	# Set initial node value
	def set_data(self) :
		if (self.node == None) :
			print("\nEmpty Graph", end = "")
		else :
			index = 0
			while (index < self.size) :
				self.node[index] = Vertices(index)
				index += 1
			
		
	
	# Connect two node
	def add_edge(self, start, last) :
		newEdge = AjlistNode(last)
		if (self.node[start].next == None) :
			# Include first adjacency list node of location start 
			self.node[start].next = newEdge
		else :
			temp = self.node[start].next
			# Add new node at the last of edge
			while (temp.next != None) :
				temp = temp.next
			
			# Add node 
			temp.next = newEdge
		
	
	# Display graph elements
	def print_graph(self) :
		if (self.size > 0 and self.node != None) :
			index = 0
			while (index < self.size) :
				print("\nAdjacency list of vertex ", index ," : ", end = "")
				temp = self.node[index].next
				while (temp != None) :
					print(self.node[temp.id].data ," ", end = "")
					temp = temp.next
				
				index += 1
			
		
	
	def clone_graph(self) :
	
		# First create same number of nodes
		# Assume given graph are contains nodes
		graph = MyGraph(self.size)
		if (self.node != None) :
			temp = None
			index = 0
			while (index < self.size) :
				temp = self.node[index].next
				while (temp != None) :
					# Add edges of new graph
					graph.add_edge(index, temp.id)
					temp = temp.next
				
				index += 1
			
		
		return graph
	

def main() :
	g1 = MyGraph(6)
	# Connected two node with Edges
	g1.add_edge(0, 0)
	g1.add_edge(1, 0)
	g1.add_edge(1, 4)
	g1.add_edge(1, 5)
	g1.add_edge(2, 0)
	g1.add_edge(2, 4)
	g1.add_edge(2, 5)
	g1.add_edge(3, 4)
	g1.add_edge(3, 5)
	g1.add_edge(5, 4)
	print("First Graph ", end = "")
	g1.print_graph()
	g2 = g1.clone_graph()
	print("\n\nClone Graph", end = "")
	g2.print_graph()


if __name__ == "__main__":
	main()

Output

First Graph
Adjacency list of vertex  0  : 0
Adjacency list of vertex  1  : 0  4  5
Adjacency list of vertex  2  : 0  4  5
Adjacency list of vertex  3  : 4  5
Adjacency list of vertex  4  :
Adjacency list of vertex  5  : 4

Clone Graph
Adjacency list of vertex  0  : 0
Adjacency list of vertex  1  : 0  4  5
Adjacency list of vertex  2  : 0  4  5
Adjacency list of vertex  3  : 4  5
Adjacency list of vertex  4  :
Adjacency list of vertex  5  : 4
 #  Ruby program
 #  Clone a Directed Graph
class AjlistNode
    # Define the accessor and reader of class AjlistNode
    attr_reader :id, :next
    attr_accessor :id, :next 

	
	def initialize(id) 
		 # Set value of node key
		self.id = id
		self.next = nil
	end
end
class Vertices
    # Define the accessor and reader of class Vertices
    attr_reader :data, :next
    attr_accessor :data, :next 
	
	def initialize(data) 
		self.data = data
		self.next = nil
	end
end
class MyGraph
    # Define the accessor and reader of class MyGraph
    attr_reader :size, :node
    attr_accessor :size, :node 
	
	def initialize(size) 
		self.size = size
		self.node = Array.new(size) {0}
		 # set initial values of graph node
		self.set_data()
	end
	 # Set initial node value
	def set_data() 
		if (@node == nil) 
			print("\nEmpty Graph")
		else 
			index = 0
			while (index < @size) 
				@node[index] = Vertices.new(index)
				index += 1
			end
		end
	end
	 # Connect two node
	def add_edge(start, last) 
		newEdge = AjlistNode.new(last)
		if (@node[start].next == nil) 
			 # Include first adjacency list node of location start 
			@node[start].next = newEdge
		else 
			temp = @node[start].next
			 # Add new node at the last of edge
			while (temp.next != nil) 
				temp = temp.next
			end
			 # Add node 
			temp.next = newEdge
		end
	end
	 # Display graph elements
	def print_graph() 
		if (@size > 0 &&
			@node != nil) 
			index = 0
			while (index < @size) 
				print("\nAdjacency list of vertex ", index ,"  : ")
				temp = @node[index].next
				while (temp != nil) 
					print(@node[temp.id].data ," ")
					temp = temp.next
				end
				index += 1
			end
		end
	end
	def clone_graph() 
		 # Assume given graph are contains nodes
		 # First create same number of nodes
		
		graph = MyGraph.new(self.size)
		if (self.node != nil) 
			temp = nil
			index = 0
			while (index < self.size) 
				temp = self.node[index].next
				while (temp != nil) 
					 # Add edges of new graph
					graph.add_edge(index, temp.id)
					temp = temp.next
				end
				index += 1
			end
		end
		return graph
	end
end
def main() 
	g1 = MyGraph.new(6)
	 # Connected two node with Edges
	g1.add_edge(0, 0)
	g1.add_edge(1, 0)
	g1.add_edge(1, 4)
	g1.add_edge(1, 5)
	g1.add_edge(2, 0)
	g1.add_edge(2, 4)
	g1.add_edge(2, 5)
	g1.add_edge(3, 4)
	g1.add_edge(3, 5)
	g1.add_edge(5, 4)
	print("First Graph ")
	g1.print_graph()
	g2 = g1.clone_graph()
	print("\n\nClone Graph")
	g2.print_graph()
end
main()

Output

First Graph 
Adjacency list of vertex 0  : 0 
Adjacency list of vertex 1  : 0 4 5 
Adjacency list of vertex 2  : 0 4 5 
Adjacency list of vertex 3  : 4 5 
Adjacency list of vertex 4  : 
Adjacency list of vertex 5  : 4 

Clone Graph
Adjacency list of vertex 0  : 0 
Adjacency list of vertex 1  : 0 4 5 
Adjacency list of vertex 2  : 0 4 5 
Adjacency list of vertex 3  : 4 5 
Adjacency list of vertex 4  : 
Adjacency list of vertex 5  : 4 
// Scala program
// Clone a Directed Graph
class AjlistNode(var id: Int,
	var next: AjlistNode) {
	def this(id: Int) {
		//Set value of node
		this(id,null);
	}
}
class Vertices(var data: Int,
	var next: AjlistNode) {


	def this(data: Int) {
		this(data,null);
	}
}
class MyGraph(var size: Int,
	var node: Array[Vertices]) {
	
	def this(size: Int) {
		//set value
        this(size,Array.fill[Vertices](size)(null));
		//set initial values of graph node
		this.set_data();
	}
	//Set initial node value
	def set_data(): Unit = {
		if (this.node == null) {
			print("\nEmpty Graph");
		} else {
			var index: Int = 0;
			while (index < this.size) {
				this.node(index) = new Vertices(index);
				index += 1;
			}
		}
	}
	//Connect two node
	def add_edge(start: Int, last: Int): Unit = {
		var newEdge: AjlistNode = new AjlistNode(last);

		if (this.node(start).next == null) {
			//Include first adjacency list node of location start 
			this.node(start).next = newEdge;
		} else {
			var temp: AjlistNode = this.node(start).next;

			//Add new node at the last of edge
			while (temp.next != null) {
				temp = temp.next;
			}
			//Add node 
			temp.next = newEdge;
		}
	}
	//Display graph elements
	def print_graph(): Unit = {
		if (this.size > 0 &&
			this.node != null) {
			var index: Int = 0;
			while (index < this.size) {
				print("\nAdjacency list of vertex " + index + " : ");
				var temp: AjlistNode = this.node(index).next;
				while (temp != null) {
					print(" "+this.node(temp.id).data );
					temp = temp.next;
				}
				index += 1;
			}
		}
	}
	def clone_graph(): MyGraph = {
		//First create same number of nodes
		//Assume given graph are contains nodes
		var graph: MyGraph = new MyGraph(this.size);

		if (this.node != null) {
			var temp: AjlistNode = null;
			var index: Int = 0;
			while (index < this.size) {
				temp = this.node(index).next;
				while (temp != null) {
					//Add edges of new graph
					graph.add_edge(index, temp.id);
					temp = temp.next;
				}
				index += 1;
			}
		}
		return graph;
	}
}
object Main {
	def main(args: Array[String]): Unit = {
		var g1: MyGraph = new MyGraph(6);

		//Connected two node with Edges
		g1.add_edge(0, 0);
		g1.add_edge(1, 0);
		g1.add_edge(1, 4);
		g1.add_edge(1, 5);
		g1.add_edge(2, 0);
		g1.add_edge(2, 4);
		g1.add_edge(2, 5);
		g1.add_edge(3, 4);
		g1.add_edge(3, 5);
		g1.add_edge(5, 4);
		print("First Graph ");
		g1.print_graph();
		var g2: MyGraph = g1.clone_graph();
		print("\n\nClone Graph");
		g2.print_graph();
	}
}

Output

First Graph
Adjacency list of vertex 0 :  0
Adjacency list of vertex 1 :  0 4 5
Adjacency list of vertex 2 :  0 4 5
Adjacency list of vertex 3 :  4 5
Adjacency list of vertex 4 :
Adjacency list of vertex 5 :  4

Clone Graph
Adjacency list of vertex 0 :  0
Adjacency list of vertex 1 :  0 4 5
Adjacency list of vertex 2 :  0 4 5
Adjacency list of vertex 3 :  4 5
Adjacency list of vertex 4 :
Adjacency list of vertex 5 :  4
// Swift program
// Clone a Directed Graph
class AjlistNode {
	//Vertices node key
	var id: Int;
	var next: AjlistNode? ;
	init(_ id: Int) {
		//Set value of node key
		self.id = id;
		self.next = nil;
	}
}
class Vertices {
	var data: Int;
	var next: AjlistNode? ;
	init(_ data: Int) {
		self.data = data;
		self.next = nil;
	}
}
class MyGraph {
	//number of Vertices
	var size: Int;
	var node: [Vertices]? = [Vertices]() ;
	init(_ size: Int) {
		self.size = size;
		
		var i = 0;
		while (i<size) {
          self.node!.append(Vertices(i));
          i+=1;
        }
	}
	
	//Connect two node
	func add_edge(_ start: Int, _ last: Int) {
		let newEdge: AjlistNode? = AjlistNode(last);
		if (self.node![start].next == nil) {
			//Include first adjacency list node of location start 
			self.node![start].next = newEdge;
		} else {
			var temp: AjlistNode? = self.node![start].next;
			//Add new node at the last of edge
			while (temp!.next != nil) {
				temp = temp!.next;
			}
			//Add node 
			temp!.next = newEdge;
		}
	}
	//Display graph elements
	func print_graph() {
		if (self.size > 0 &&
			self.node != nil) {
			var index: Int = 0;
			while (index < self.size) {
				print("\nAdjacency list of vertex ", index ," : ", terminator: "");
				var temp: AjlistNode? = self.node![index].next;
				while (temp != nil) {
					print(self.node![temp!.id].data ," ", terminator: "");
					temp = temp!.next;
				}
				index += 1;
			}
		}
	}
	func clone_graph() -> MyGraph? {
		//First create same number of nodes
		//Assume given graph are contains nodes
		let graph: MyGraph? = MyGraph(self.size);
		if (self.node != nil) {
			var temp: AjlistNode? = nil;
			var index: Int = 0;
			while (index < self.size) {
				temp = self.node![index].next;
				while (temp != nil) {
					//Add edges of new graph
					graph!.add_edge(index, temp!.id);
					temp = temp!.next;
				}
				index += 1;
			}
		}
		return graph;
	}
}
func main() {
	let g1: MyGraph? = MyGraph(6);
	//Connected two node with Edges
	g1!.add_edge(0, 0);
	g1!.add_edge(1, 0);
	g1!.add_edge(1, 4);
	g1!.add_edge(1, 5);
	g1!.add_edge(2, 0);
	g1!.add_edge(2, 4);
	g1!.add_edge(2, 5);
	g1!.add_edge(3, 4);
	g1!.add_edge(3, 5);
	g1!.add_edge(5, 4);
	print("First Graph ", terminator: "");
	g1!.print_graph();
	let g2: MyGraph? = g1!.clone_graph();
	print("\n\nClone Graph", terminator: "");
	g2!.print_graph();
}
main();

Output

First Graph
Adjacency list of vertex  0  : 0
Adjacency list of vertex  1  : 0  4  5
Adjacency list of vertex  2  : 0  4  5
Adjacency list of vertex  3  : 4  5
Adjacency list of vertex  4  :
Adjacency list of vertex  5  : 4

Clone Graph
Adjacency list of vertex  0  : 0
Adjacency list of vertex  1  : 0  4  5
Adjacency list of vertex  2  : 0  4  5
Adjacency list of vertex  3  : 4  5
Adjacency list of vertex  4  :
Adjacency list of vertex  5  : 4


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