/* PRIM'S */
#include<stdio.h>
#include<conio.h>
int a,b,u,v,n,i,j,ne=1;
int visited[10]={0},min,mincost=0,cost[10][10];
void main()
{
clrscr();
printf("\n Enter the number of nodes:");
scanf("%d",&n);
printf("\n Enter the adjacency matrix:\n");
for(i=1;i<=n;i++)
for(j=1;j<=n;j++)
{
scanf("%d",&cost[i][j]);
if(cost[i][j]==0)
cost[i][j]=999;
}
visited[1]=1;
printf("\n");
while(ne<n)
{
for(i=1,min=999;i<=n;i++)
for(j=1;j<=n;j++)
if(cost[i][j]<min)
if(visited[i]!=0)
{
min=cost[i][j];
a=u=i;
b=v=j;
}
if(visited[u]==0 || visited[v]==0)
{
printf("\n Edge %d:(%d %d) cost:%d",ne++,a,b,min);
mincost+=min;
visited[b]=1;
}
cost[a][b]=cost[b][a]=999;
}
printf("\n Minimum cost=%d",mincost);
getch();
}
/* OUTPUT
Enter the number of nodes:6
Enter the adjacency matrix:
0 6 3 0 0 0
6 0 2 5 0 0
3 2 0 3 4 0
0 5 3 0 2 3
0 0 4 2 0 5
0 0 0 3 5 0
Edge 1:(1 3) cost:3
Edge 2:(3 2) cost:2
Edge 3:(3 4) cost:3
Edge 4:(4 5) cost:2
Edge 5:(4 6) cost:3
Minimum cost=13
*/
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