87 lines
2.2 KiB
C
87 lines
2.2 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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typedef struct Node
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{
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int vertex;
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struct Node* next;
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} Node;
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typedef struct Graph
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{
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int vertices;
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Node** adjList;//array of ll
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} Graph;
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Node* createNode(int vertex)
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{
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Node* newNode = (Node*)malloc(sizeof(Node));
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newNode->vertex = vertex;
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newNode->next = NULL;
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return newNode;
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}
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Graph* createGraph(int vertices) //vertices is the number of vertices
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{
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Graph* graph = (Graph*)malloc(sizeof(Graph));
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graph->vertices = vertices;// no of vertices bataye
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graph->adjList = (Node**)malloc(vertices * sizeof(Node*));//adjlist ko sahi size diya ie saare vertices
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for (int i = 0; i < vertices; i++)
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graph->adjList[i] = NULL;//default setup
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return graph;
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}
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void addEdgeUndirected(Graph* graph, int start, int end)//inset begin of nodes
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{
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Node* newNode = createNode(end);
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newNode->next = graph->adjList[start];
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graph->adjList[start] = newNode;
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newNode = createNode(start);
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newNode->next = graph->adjList[end];
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graph->adjList[end] = newNode;
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}
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void addEdgeDirected(Graph* graph, int start, int end)
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{
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Node* newNode = createNode(end);
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newNode->next = graph->adjList[start];
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graph->adjList[start] = newNode;
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}
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void displayGraph(Graph* graph)
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{
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for (int i = 0; i < graph->vertices; i++)
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{
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Node* current = graph->adjList[i];
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printf("Adjacency list for vertex %d: ", i);
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while (current != NULL)
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{
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printf("%d -> ", current->vertex);
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current = current->next;
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}
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printf("NULL\n");
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}
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}
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int main() {
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int vertices, edges, i, start, end, isDirected;
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printf("Enter the number of vertices: ");
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scanf("%d", &vertices);
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Graph* graph = createGraph(vertices);
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printf("Is the graph directed? (1 for yes, 0 for no): ");
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scanf("%d", &isDirected);
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printf("Enter the number of edges: ");
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scanf("%d", &edges);
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printf("Enter the edges (start and end vertex) separated by space:\n");
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for (i = 0; i < edges; i++)
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{
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scanf("%d %d", &start, &end);
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if (isDirected)
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addEdgeDirected(graph, start, end);
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else
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addEdgeUndirected(graph, start, end);
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}
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displayGraph(graph);
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return 0;
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}
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