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Represent a graph using adjacency matrix / Represent a graph using adjacency list.

CODE:


 //Graph using adjacency matrix

#include<iostream>

using namespace std;

int vertArr[20][20];

int count = 0;

void displayMatrix(int v) {

int i, j;

for(i = 0; i < v; i++) {

for(j = 0; j < v; j++) {

cout<<vertArr[i][j]<<" ";

}

cout<<endl;


}

}

void add_edge(int u, int v) {

vertArr[u][v] = 1;

vertArr[v][u] = 1;

}

main(int argc, char* argv[]) {

int v = 6;

add_edge(0, 4);

add_edge(0, 3);

add_edge(1, 2);

add_edge(1, 4);

add_edge(1, 5);

add_edge(2, 3);

add_edge(2, 5);

add_edge(5, 3);

add_edge(5, 4);


displayMatrix(v);

}

//Graph using adjacency list

#include <iostream>

const int MAX_VERTICES = 100;

class Graph {

int numVertices;

int adjList[MAX_VERTICES][MAX_VERTICES];

int numNeighbors[MAX_VERTICES];


public:

Graph(int V) {

numVertices = V;


for (int i = 0; i < numVertices; ++i) {

numNeighbors[i] = 0;

for (int j = 0; j < numVertices; ++j) {

adjList[i][j] = 0;

}

}


}


void addEdge(int u, int v) {

adjList[u][numNeighbors[u]++] = v;

adjList[v][numNeighbors[v]++] = u;

}


void printAdjList() {

for (int i = 0; i < numVertices; ++i) {

std::cout << "Adjacency list of vertex " << i << ": ";

for (int j = 0; j < numNeighbors[i]; ++j) {

std::cout << adjList[i][j] << " ";

}

std::cout << std::endl;

}

}

};


int main() {

int numVertices = 5;

Graph graph(numVertices);


graph.addEdge(0, 1);

graph.addEdge(0, 2);

graph.addEdge(1, 3);


graph.addEdge(2, 4);

graph.addEdge(3, 4);


graph.printAdjList();


return 0;

}









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