Warshall's Algorithm

#include<stdio.h>
#define n 4
void warshal(int g[n][n])
{
    int i,j,k;
    for(k=0;k<n;k++)
        for(i=0;i<n;i++)
            for(j=0;j<n;j++)
                g[i][j] = (g[i][j] || (g[i][k] && g[k][j]));
    for(i=0;i<n;i++)
    {
        for(j=0;j<n;j++)
            printf("%d\t", g[i][j]);
        printf("\n");
    }
}
void main()
{
    int g[n][n]={{0,1,0,0},
                 {0,0,0,1},
                 {0,0,0,0},
                 {1,0,1,0}};
    warshal(g);
}