Write a Program to implement Breadth First Traversal Algorithm
Sample input
case=1
input= 5
0 1 1 1 0
1 0 1 0 0
1 1 0 0 1
1 0 0 0 0
0 0 1 0 0
0
Sample output=0 1 2 3 4
code👇👇👇👇👇👇👇👇👇
#include<stdio.h>
int a[20][20],q[20],visited[20],n,f=-1,r=-1;
void bfs(int v)
{
int i;
for(i=0;i<n;i++)
{
if(a[v][i]!=0 && visited[i]==0)
{
r=r+1;
q[r]=i;
visited[i]=1;
printf("%d ",i);
}
}
f=f+1;
if(f<=r)
{
bfs(q[f]);
}
}
int main()
{
int v,i,j;
printf("\nEnter the number of vertices: ");
scanf("%d ",&n);
for(i=0;i<n;i++)
{
visited[i]=0;
}
printf(" \nEnter the graph data in the matrix form :\n");
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
scanf("%d",&a[i][j]);
}
}
printf("\n Enter the starting vertex:\n");
scanf("%d",&v);
f=r=0;
q[r]=v;
printf("\n The BFS traversal is :\n");
visited[v]=1;
printf("%d ",v);
bfs(v);
if(r!=n-1)
{
printf("\n BFS is not possible");
}
}
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