November 2016
Beginner to intermediate
816 pages
19h 58m
Japanese
Content preview from Cクイックリファレンス 第2版
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
268
15
章 プリプロセッサ指令
とする。
line_number
は0より大きい10進定数でなければならない。例を挙げる。
#line 1200 "primary.c"
#line
指令を含む行はマクロが入ってもよい。その場合、プリプロセッサは
#line
指令を
実行する前にそれを展開する。マクロ展開後
#line
指令は正当でなければならない。
プログラムは現在の行番号とファイル名を標準定義済みマクロ
__LINE__
と
__FILE__
でア
クセスできる。
printf("This message was printed by line %d in the file %s.\n",
__LINE__, __FILE__);
#line
指令は普通Cソースコードを出力として生成するプログラムが使う。
#line
指令に
対応する入力ファイルと行番号を置くことによって、このプログラムはCコンパイラのエ
ラーメッセージが元のソースの適切な行を参照で
きる。
15.6
エラーメッセージを生成
#error
指令は、実際にエラーがあったかどうかにかかわらず、プリプロセッサがエラー
メッセージを表示するようにする。構文は次の通り。
#error [
text
]
オプションの
text
があれば、プリプロセッサのエラーメッセージに含まれる。コンパイ
ラはソースファイルの処理を停止して、致命的エラーがあったかのように終了する。
text
は
どのようなプリプロセッサトークン列でもよい。マクロが含まれていても展開されない。一
重引用符のような句読点の問題
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.