Program to find the shortes path

/* Program to find the shortes path. */

#include <stdio.h>
#include <conio.h>

#define INF 9999

void main( )
{
int arr[4][4] ;
int cost[4][4] = {
7, 5, 0, 0,
7, 0, 0, 2,
0, 3, 0, 0,
4, 0, 1, 0
} ;
int i, j, k, n = 4 ;

clrscr( ) ;

for ( i = 0 ; i < n ; i++ )
{
for ( j = 0; j < n ; j++ )
{
if ( cost[i][j] == 0 )
arr[i][j] = INF ;
else
arr[i][j] = cost[i][j] ;
}
}

printf ( "Adjacency matrix of cost of edges:\n" ) ;
for ( i = 0 ; i < n ; i++ )
{
for ( j = 0; j < n ; j++ )
printf ( "%d\t", arr[i][j] ) ;
printf ( "\n" ) ;
}

for ( k = 0 ; k < n ; k++ )
{
for ( i = 0 ; i < n ; i++ )
{
for ( j = 0 ; j < n ; j++ )
{
if ( arr[i][j] > arr[i][k] + arr[k][j] )
arr[i][j] = arr[i][k] + arr[k][j];
}
}
}

printf ( "\nAdjacency matrix of lowest cost between the vertices:\n" ) ;
for ( i = 0 ; i < n ; i++ )
{
for ( j = 0; j < n ; j++ )
printf ( "%d\t", arr[i][j] ) ;
printf ( "\n" ) ;
}

getch( ) ;
}