A nice, little known C feature: Static array indices in parameter declarations The people who created C sure loved keeping the number of keywords low, and today I’m going to show you yet another place you can use the static keyword in C99. You might have seen function parameter declaration for array parameters that include the size: The function will still receive a naked int *, but the [10] part
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typester 2013/02/19
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宣言 - odz buffer
ref:http://sakurai.sumomo.ne.jp/page/c_pointer まぁ、普通は typedef 使え、ってな話だよね。signal の宣言なんか typedef 使わないとひどい。 /* with typedef */ typedef void (*sighandler_t)(int); signalder_t signal(int signo, sighandler_t handler); /* without typedef */ void (*signal(int signo, void (*handler)(int)))(int); ちなみに、宣言文と英語を相互変換してくれる Web サイトとかあったりする(ただし、仮引数の名前は書けない)。 ref:http://cdecl.org 変換プログラム自体も公開されている。 % wget http://cd
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Cでのポインタの読み方
Cでのポインタの読み方 Cのポインタの読み方は、ルールを知らないと摩訶不思議です。 ルールを覚えれば、 int (*p[5])[3]; char (*(*fp)(void))(int); なんてのも解読する事ができます。 大事な前程 ポインタを読む際には、「英語で読む」必要があります。 「え～、英語～」 と思う方もいるかもしれませんが、逆に日本語で読む方が大変です。 基本ルール ルール 後置演算子が優先。 関数の() 配列の[] 前置はあとで。 要は、「後ろに何かあったら、後ろが優先」です。 演算子の英語での読み方 * pointer to ... () function returning ... [] array of ... Lesson 1 まず、演算子が単独で出てくる場合です。 Lesson 1-1 pointer to ... int *p; これは、まずpを見ましょう。 i
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