Write Scheme Functions With The Following Description Usage Powerlist X Before X
3).
Write Scheme functions with the following description:
a).
Usage: (powerlist x)
Before: x is a finite list, x=(x1 x2 … x N)
After: The list (y1 y2 y3 …)
For example:
(powerless ‘()) should give (())
(powerlist ‘(1)) could give (() (1)) or the list ((1) ()).
(powerlist ‘(1 2)) could give (() (1) (2) ( 1 2 ))
b).
Usage: (cross a b )
Before: a and b are finite lists, a=(a1, a2, … aN)
x=(b1, b2, … bM)
After: List, ((a1 b1) (a1 b2 … (a1 bM)..
For example :
(Cross ‘() ‘(1 2 3)) should give ()
(Cross ‘(1) ‘(4)) should give ((1 1 ))
(Cross ‘(1 2 ) ‘(3 4)) should give ((1 3) (1 4) (2 3) (2 4))
// map and append can be used
