| S-EXPRESSION | Prediction | Scheme Says |
| (+ 7 2) | ||
| (7 + 2) | ||
| (7 2 +) | ||
| + 7 2 | ||
| '( + 7 2) | ||
| (quote (+ 7 2) ) | ||
| (eval '(+ 7 2) ) | ||
| (eval (+ 7 2)) | ||
| 19 | ||
| (19) | ||
| '(19) | ||
| '() | ||
| (car '(1 2 3)) | ||
| (cdr '(1 2 3)) | ||
| (car '((1 2 3)
(4 5 6) (7 8 9) ) |
||
| (cdr '((1 2 3)
(4 5 6) (7 8 9) ) |
||
| (car (car '((1 2 3)
(4 5 6) (7 8 9) )) |
||
| (cdr (cdr '((1 2 3)
(4 5 6) (7 8 9) )) |
||
| (car '() ) | ||
| (cdr '() ) | ||
| (reverse '((1 2 3)
(4 5 6) (7 8 9) )) |
||
| (list 1 2 3) | ||
| (log 3) | ||
| (sqrt 3 2 1) | ||
| (remainder 3 1.7) | ||
| (map sqrt '(16 4 2)) |
QUESTION 2: Write Scheme espressions that do the following:
EXAMPLE: To extract the middle row of the array
"( (1 2 3) (4 5 6) (7 8 9))", how about: "(car (cdr '(
(1 2 3) (4 5 6) (7 8 9)) ))"
or simple "(cadr '( (1 2 3) (4 5 6) (7 8 9)) )"
(A) Extract the last element ("9") from the array "( (1 2 3) (4
5 6) (7 8 9))"
(B) Remove the last two rows of the matrix "( (1 2 3) (4
5 6) (7 8 9))". In other words, "( (1 2 3)
(4 5 6) (7 8 9))" becomes "( (1 2 3) )".
(C) Define a function square, that squares it's argument. When you're done I should be able to say (square 3) and get 9.