dvr

#include<stdio.h>
void main()
{
        int n,i,j,k;
        printf("Enter no of nodes in subnet:");
        scanf("%d",&n);
        int a[n][n];
          struct rt
        {
                int rout[n];
        };
        for(i=0;i<n;i++)
        {
                for(j=0;j<n;j++)
                {
                        a[i][j]=0;
                }
        }
        for(i=0;i<n;i++)
        {
                for(j=0;j<n;j++)
                {
                        if(i==j)
                                a[i][j]=0;
                        else
                        {
                                if(i>j)
                                {
                                        a[i][j]=a[j][i];
                                }
                                else
                                {
                                printf("path from %d to %d:",i,j);
                                scanf("%d",&a[i][j]);
                                a[j][i]=a[i][j];
                                }
                        }
                }
        }
        int node,adj[n],m=0;
         printf("enter the node for which routing table is to be calculated:");
        scanf("%d",&node);
        for(i=0;i<n;i++)
        {
                if(a[node][i]!=0)
                {
                        adj[m++]=i;
                }
        }
        struct rt tables[m];
        for(i=0;i<m;i++)
        {
                for(j=0;j<n;j++)
                {
                        printf("enter the delay to go from %d to %d:",j,adj[i]);
                        scanf("%d",&tables[i].rout[j]);
                }
        }
        int delays[m];
        for(i=0;i<m;i++)
        {
        printf("enter the delay from %d to %d:",node,adj[i]);
        scanf("%d",&delays[i]);
        }
        int rrtable[n][2];
        for(i=0;i<n;i++)
        {
                int min=5000,temp=0,in;
                if(i==node)
                {
                        rrtable[i][0]=0;
                        rrtable[i][1]=-1;
                }
                else
                {
                for(k=0;k<m;k++)
                {
                        temp=tables[k].rout[i]+delays[k];
                        if(temp<min)
                        {
                                min=temp;
                                in=adj[k];
                        }
	}
                rrtable[i][0]=min;
                rrtable[i][1]=in;
                }
        }
        printf("TO\tnode%d\tintermediate router\n",node);
        for(i=0;i<n;i++)
                printf("%d\t%d\t%d\n",i,rrtable[i][0],rrtable[i][1]);
}