ProgrammingLanguage

Racket cute Intepreter

Input 양식

노드들 사이에 띄어쓰기 해서 입력

( car ' ( 1 2 3 ) ) 

함수 설명

1. CAR

 > ( car ' ( 2 3 4 ) )
... 2

2. CDR

 > ( cdr ' ( 2 3 4 ) )
... ' ( 3 4 )

3. CONS

 > ( cons ' ( 2 3 ) ' ( 4 5 6 ) )
... ' ( ( 2 3 ) 4 5 6 )

4. NULL?

 > ( null? ' ( ) )
... #T
> ( null? ' ( 1 2 3 ) )
... #F

5. ATOM?

 > ( atom? ' ( ) )
... #T
> ( atom? ' ( 1 2 ) )
... #F

6. EQ?

 > ( eq? ' a ' a )
... #T
> ( eq? ' ( 1 2 ) ' ( 1 2 ) )
... #F

7. NOT

 > ( not ( < 1 2 ) )
... #F

8. DEFINE

 > ( define a 1 )
> a
... 1

9. lambda

> ( define plus1 ( lambda ( x ) ( + x 1 ) ) )
> ( plus1 2 )
... 3
> ( define plus2 ( lambda ( x ) (+ ( plus1 x ) 1 ) ) )
> ( plus2 3 )
... 5
> ( define cube ( lambda ( n ) ( define sqrt ( lambda ( n ) ( * n n ) ) ) ( * ( sqrt n ) n ) ) )
... ( cube 3 )

10. binary

> ( + 1 2 )
... 3
> ( > 3 4 )
... #F
> ( = 1 1 )
... #T