質問編集履歴
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自分なりの回答を追加
test
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@@ -56,7 +56,7 @@
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; Value: (anne marrie heather)
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(family-name (make-person "williams" "anne
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(family-name (make-person "williams" "anne" "marie" "heather"))
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; Value: williams
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@@ -74,6 +74,68 @@
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###追記です．
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まず，最初の３問についてですが，以下のように関数を定義して解決しました．
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```lisp
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>(define (names x)
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(car x))
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> (names test-person)
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'("james" "tom" "harry")
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> (define (salary x)
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(car (cdr x)))
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> (salary test-person)
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300000
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(define (position x)
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(cdr (cdr x)))
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> (position test-person)
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'("president")
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```
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さらに，最後の2問ですが以下のように関数を定義して解決しました．
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```lisp
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> (define (given-names x)
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(cdr x))
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> (given-names (make-person "williams" "anne" "marie" "heather"))
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'("anne" "marie" "heather")
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> (define (family-name x)
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(car x))
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> (family-name (make-person "williams" "anne" "marie" "heather"))
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"williams"
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```
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###補足情報(言語/FW/ツール等のバージョンなど)
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実行環境は[DrRacket](https://racket-lang.org/)です．
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