10. check whether a given graph is connected or not using DFS method.

#include<stdio.h>
#include<conio.h>
void dfs(int n,int cost[10][10],int u,int s[])
{
int v;
s[u]=1;
for(v=0;v<n;v++)
{
if(cost[u][v]==1 && s[v]==0)
{
dfs(n,cost,v,s);
}
}
}
void main()
{
int n,i,j,cost[10][10],s[10],connected,flag;
clrscr();
printf("\n enter the number of nodes\n");
scanf("%d",&n);
printf("\n enter the adjacency matrix\n");
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
scanf("%d",&cost[i][j]);
]
}
connected=0;
for(j=0;j<n;j++)
{
for(i=0;i<n;i++)
s[i]=0;
dfs(n,cost,j,s);
flag=0;
for(i=0;i<n;i++)
{
if(s[i]==0)
flag=1;
}
if(flag==0)
connected=1;
}
if(connected==1)
printf("graph is connected\n");
else
printf("graph is not connected\n");
getch();
}