WAP to Subtraction of one pointer from another

/*WAP to Subtraction of one pointer from another*/

#include<stdio.h>
#include<conio.h>
main( )
{
 int  arr[ ] = { 10, 20, 30, 45, 67, 56, 74 } ;
 int  *i, *j ;

 i = &arr[1] ;
 j = &arr[5] ;
 printf ( "%d %d", j - i, *j - *i ) ;
}