C Program to implement Dijkstra’s algorithm. Dijkstra’s Algorithm finds the shortest path with the lower cost in a Graph. Dijkstra’s Algorithm solves the Single Source Shortest Path problem for a Graph. It is a Greedy algorithm and similar to Prim’s algorithm. Read more about C Programming Language .

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#include "stdio.h"

#include "conio.h"

#define infinity 999

void dij(int n,int v,int cost[10][10],int dist[])

{

int i,u,count,w,flag[10],min;

for(i=1;i<=n;i++)

flag[i]=0,dist[i]=cost[v][i];

count=2;

while(count<=n)

{

min=99;

for(w=1;w<=n;w++)

if(dist[w]<min && !flag[w])

min=dist[w],u=w;

flag[u]=1;

count++;

for(w=1;w<=n;w++)

if((dist[u]+cost[u][w]<dist[w]) && !flag[w])

dist[w]=dist[u]+cost[u][w];

}

}

void main()

{

int n,v,i,j,cost[10][10],dist[10];

clrscr();

printf("n Enter the number of nodes:");

scanf("%d",&n);

printf("n Enter the cost 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]=infinity;

}

printf("n Enter the source matrix:");

scanf("%d",&v);

dij(n,v,cost,dist);

printf("n Shortest path:n");

for(i=1;i<=n;i++)

if(i!=v)

printf("%d->%d,cost=%dn",v,i,dist[i]);

getch();

}

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## 6 comments on “C Program to implement Dijkstra’s algorithm.”

can you please give the explanation for the programs

Hello,

That'll be a nice thing to add to this website. But there are so many programs, it's practically impossible to write explanation for everything.

However, if you have a specific question you can email to [email protected]

Cheers!

thanks this progarm is successfully execute

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happy codeing!

Thank you, but it would more helpful if you would display even the output :)(just a suggestion)

@Bandela Sanyo:

Sure. Will try to do it soon.

Thanks for your comment. Feel free to share.