Function for finding elements which are there in a [ ] but not in b [ ] .
void findMissing ( int a [ ] , int b [ ] , int n , int m ) { for ( int i = 0 ; i < n ; i ++ ) { int j ; for ( j = 0 ; j < m ; j ++ ) if ( a [ i ] == b [ j ] ) break ; if ( j == m ) cout << a [ i ] << " ▁ " ; } }