DFS.c

//dfs
#include<stdio.h>

void DFS(int);
int G[10][10],visited[10],n;    //n is no of vertices and graph is sorted in array G[10][10]

int main()
{
    int i,j;
    printf("Enter number of vertices:");
    
    scanf("%d",&n);
    
    //read the adjecency matrix
    printf("\nEnter adjecency matrix of the graph:");
    
    for(i=0;i<n;i++)
        for(j=0;j<n;j++)
            scanf("%d",&G[i][j]);
    
    //visited is initialized to zero
    for(i=0;i<n;i++)
        visited[i]=0;
    
    DFS(0);
    return 0;
}

void DFS(int i)
{
    int j;
    printf("\n%d",i);
    visited[i]=1;
    
    for(j=0;j<n;j++)
        if(!visited[j]&&G[i][j]==1)
            DFS(j);
}