はじめに
この記事は 共通テスト手順記述標準言語 (DNCL) Advent Calendar 2025 の１２日目の記事です。
DNCLでシフト暗号を使っていきます！
DNCLを書く
関数添え字(配列, 文字)を引数の配列で文字に対応する値の添え字（０から始まる。）を返すものとします。kagiが何文字ずらすかを表します。
暗号化
mozi ← ["ア","イ","ウ","エ","オ","カ","キ","ク","ケ","コ","サ","シ","ス","セ","ソ","タ","チ","ツ","テ","ト","ナ","ニ","ヌ","ネ","ノ","ハ","ヒ","フ","ヘ","ホ","マ","ミ","ム","メ","モ","ヤ","ユ","ヨ","ラ","リ","ル","レ","ロ","ワ","ヲ","ン"]
bunsyo ← "クリスマス"
mozisu ← 5
kagi ← 3
ans ← ""
i を0から mozisu - 1 まで1ずつ増やしながら
| v ← (添え字(mozi,bunsyo[i]) + kagi) % 要素数(mozi)
| ans ← ans + mozi[v]
を繰り返す
ans を表示する
復号
mozi ← ["ア","イ","ウ","エ","オ","カ","キ","ク","ケ","コ","サ","シ","ス","セ","ソ","タ","チ","ツ","テ","ト","ナ","ニ","ヌ","ネ","ノ","ハ","ヒ","フ","ヘ","ホ","マ","ミ","ム","メ","モ","ヤ","ユ","ヨ","ラ","リ","ル","レ","ロ","ワ","ヲ","ン"]
bunsyo ← "クリスマス"
mozisu ← 5
kagi ← 3
ans ← ""
i を0から mozisu - 1 まで1ずつ増やしながら
| v ← (添え字(mozi,bunsyo[i]) + 要素数(mozi) - kagi) % 要素数(mozi)
| ans ← ans + mozi[v]
を繰り返す
ans を表示する