PROGRAM:
#iinclude<stdio.h>
#include<string.h>
int main()
{
int
count,src_router,i,j,k,w,v,min;
int
cost_matrix[100][100],dist[100],last[100];
int flag[100];
printf("\n Enter the no of
routers");
scanf("%d",&count);
printf("\n Enter the cost
matrix values:");
for(i=0;i<count;i++)
{
for(j=0;j<count;j++)
{
printf("\n%d->%d:",i,j);
scanf("%d",&cost_matrix[i][j]);
if(cost_matrix[i][j]<0)
cost_matrix[i][j]=1000;
}
}
printf("\n Enter the source
router:");
scanf("%d",&src_router);
for(v=0;v<count;v++)
{
flag[v]=0;
last[v]=src_router;
dist[v]=cost_matrix[src_router][v];
}
flag[src_router]=1;
for(i=0;i<count;i++)
{
min=1000;
for(w=0;w<count;w++)
{
if(!flag[w])
if(dist[w]<min){
v=w;
min=dist[w];
}
}
flag[v]=1;
for(w=0;w<count;w++)
{
if(!flag[w])
if(min+cost_matrix[v][w]<dist[w])
{
dist[w]=min+cost_matrix[v][w];
last[w]=v;
}
}
}
