Add File

Assignment programs/BFSCyclic.c

@@ -1,98 +1,99 @@
-//Program to check if graph is cyclic or not using bfs
-#include<stdio.h>
+// Program to check if graph is cyclic or not using bfs
+#include <stdio.h>
 #define MAX 100
 
 int count = 0, queue[MAX], front = 0, rear = -1;
 void insertQueue(int element)
 {
-queue[++rear] = element;
+    queue[++rear] = element;
 }
 
 void deleteQueue()
 {
-queue[front++];
-if(front > rear)
-{
-    front = 0;
-    rear = -1;
-}
+    queue[front++];
+    if (front > rear)
+    {
+        front = 0;
+        rear = -1;
+    }
 }
 
 void readMatrix(int matrix[][MAX], int n)
 {
-int i, j;
-for(i = 0; i < n; i++)
-{
-    for(j = 0; j < n; j++)
+    int i, j;
+    for (i = 0; i < n; i++)
     {
-        scanf("%d", &matrix[i][j]);
+        for (j = 0; j < n; j++)
+        {
+            scanf("%d", &matrix[i][j]);
+        }
     }
 }
-}
 
 void markUnvisited(int visitedNodes[], int nodeCount)
 {
-int i;
-for(i = 0; i < nodeCount; i++)
-{
-    visitedNodes[i] = 0;
-}
+    int i;
+    for (i = 0; i < nodeCount; i++)
+    {
+        visitedNodes[i] = 0;
+    }
 }
 
 int bfs(int v, int graph[][MAX], int visitedNodes[], int nodeCount)
 {
-insertQueue(v);
-while (front <= rear)
-{
-    int frontElement = queue[front], w;
-    deleteQueue();
-    if (visitedNodes[frontElement] != 0 || graph[frontElement][frontElement] == 1)
-    {
-        return 1;
-    }
-    count++;
-    visitedNodes[frontElement] = count;
-    for (w = 0; w < nodeCount; w++)
+    insertQueue(v);
+    while (front <= rear)
     {
-        if (graph[frontElement][w] == 1 && visitedNodes[w] == 0)
+        int frontElement = queue[front], w;
+        deleteQueue();
+        if (visitedNodes[frontElement] != 0 || graph[frontElement][frontElement] == 1)
         {
-            insertQueue(w);
+            return 1;
+        }
+        count++;
+        visitedNodes[frontElement] = count;
+        for (w = 0; w < nodeCount; w++)
+        {
+            if (graph[frontElement][w] == 1 && visitedNodes[w] == 0)
+            {
+                insertQueue(w);
+            }
         }
     }
-}
-return 0;
+    return 0;
 }
 
 int isCyclic(int graph[][MAX], int visitedNodes[], int nodeCount)
 {
-int v;
-for(v = 0; v < nodeCount; v++)
-{
-    if(visitedNodes[v] == 0)
+    int v;
+    for (v = 0; v < nodeCount; v++)
     {
-        if(bfs(v, graph, visitedNodes, nodeCount) == 1){
-            return 1;
+        if (visitedNodes[v] == 0)
+        {
+            if (bfs(v, graph, visitedNodes, nodeCount) == 1)
+            {
+                return 1;
+            }
         }
     }
-}
-return 0;
+    return 0;
 }
 
 int main()
 {
-int nodeCount, graph[MAX][MAX], visitedNodes[MAX];
-printf("Enter the number of nodes: ");
-scanf("%d", &nodeCount);
-printf("Enter the adjacency matrix:\n");
-readMatrix(graph, nodeCount);
-markUnvisited(visitedNodes, nodeCount);
-if(isCyclic(graph, visitedNodes, nodeCount))
-{
-    printf("The graph is cyclic\n");
-}
-else
-{
-    printf("The graph is acyclic\n");
-}
-return 0;
+    int nodeCount, graph[MAX][MAX], visitedNodes[MAX];
+    printf("Enter the number of nodes: ");
+    scanf("%d", &nodeCount);
+    printf("Enter the adjacency matrix:\n");
+    readMatrix(graph, nodeCount);
+    markUnvisited(visitedNodes, nodeCount);
+    if (isCyclic(graph, visitedNodes, nodeCount))
+    {
+        printf("The graph is cyclic\n");
+    }
+    else
+    {
+        printf("The graph is acyclic\n");
+    }
+    return 0;
 }