Bfs

#include<bits/stdc++.h>
using namespace std;

#define white 1
#define gray 2
#define black 3

char adj[125][125];
char parent[125];
int color[8];
int dis[8];
int path[8];
int n,e;


void bfs(char snode)
{
    char i,j,x;
    for(i=0;i<n;i++)
    {
        color[i]=white;
        parent[i]=-1;
        dis[i]=-1;
    }
    color[snode]=gray;
    parent[snode]=-1;
    dis[snode]=0;
    queue<char>q;
    q.push(snode);
    while(!q.empty())
    {
        x=q.front();
        q.pop();
        for(i=0;i<n;i++)
        {
            if(adj[x][i]==1)
            {
                if(color[i]==white)
                {
                    parent[i]=x;
                    dis[i]=dis[x]+1;
                    q.push(i);
                }
            }
        }
        color[x]=black;
    }
}
int main()
{

  cout<<"Enter no of node and edge:";
  cin>>n>>e;
  char u,v,snode;
  int i;
  cout<<"Enter nodes:\n";
  for(i=1;i<=e;i++)
  {
      cin>>u>>v;
      adj[u][v]=1;
  }
  cout<<"Enter source node:";
  cin>>snode;
  cout<<"path:\n";
  bfs(snode);

  return 0;
}