Parcugere in latime (grafuri)

void bf(int x)
{
    int viz[1000]={0},co[1000],p,u,l,c;

    p=u=1;
    co[p]=x;
    viz[x]=1;
    while (p<=u)
    {
        l=co[p];
        for (c=1;c<=n;c++)
            if (a[l][c]==1 && viz[c]==0)
        {
            u++;
            co[u]=c;
            viz[c]=1;
            p++;
        }
    }


}