prims algorithm

does anybody know where can i find the source code for prim algorithm.or can u help me with the code

i know how floyd's algorithm works

Code:

---

void floyd2(int n, long W[5][5], long D[5][5], long P[5][5])
{
        int i,j,k;
        for(i = 1;i <= n;i++)

                for(j = 1; j <= n;j++)
                                P[i][j] = 0;

        D = W;

        for(k = 1;k <= n;k++)

                for(i = 1;i <=n;i++)

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

                                if(D[i][k] + D[k][j] < D[i][j]) {
                                        P[i][j] = k;
                                        D[i][j] = D[i][k] + D[k][j];
                                }

}

---

i think they are similar but i dont know how to do it