[plt-scheme] any idea on this please

sir Good Day :

PLT Schemes
i used this utility functions i used it to manipulate the stream such as map and filter.

> ( define (inc x) (+ 1 x))
>(define int (make-stream 0 inc )
>(define sqr x ))
> (stream-print (stream-map int sqr) 10)
   ( 0 1 4 9 16 25 36 49 64 81 ) ...... output
>( stream-print (stream-filter int odd?) 15 )
( 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29)

i have to used the utility functions below 

1. (stream-map stream op)
2.(stream-filter stream ok? )

" i used the accessor stream-current and stream-next to access the succeeding stream.


Thanks a lot i hope you give us ideas on this :)

More Power ...... 

       
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